下面列出了java.lang.Double#parseDouble ( ) 实例代码，或者点击链接到github查看源代码，也可以在右侧发表评论。
private void leaseAndDeleteTasks(HttpServletRequest req, HttpServletResponse resp)
throws ServletException, IOException {
int numTasks = Integer.parseInt(req.getParameter("numTasks"));
Double lease = Double.parseDouble(req.getParameter("lease"));
String queue = req.getParameter("queue");
Queue q = QueueFactory.getQueue(queue);
Boolean doDelete = Boolean.parseBoolean(req.getParameter("doDelete"));
List<TaskHandle> tasks = q.leaseTasks(lease.intValue() * 1000, TimeUnit.MILLISECONDS, numTasks);
for (TaskHandle task : tasks) {
if (doDelete) {
q.deleteTask(task.getName());
}
}
resp.getWriter().print(queue + "," + tasks.size());
}
public static AarhusTrafficObservation getStreamData(String dataFile) throws NumberFormatException, IOException {
CsvReader streamData = new CsvReader(String.valueOf(dataFile));
streamData.readHeaders();
// Reads csv document for traffic metadata
try {
CsvReader metaData = new CsvReader("dataset/MetaData/trafficMetaData.csv");
metaData.readHeaders();
AarhusTrafficObservation data = new AarhusTrafficObservation();
while (streamData.readRecord()) {
while (metaData.readRecord()) {
if (streamData.get("REPORT_ID").equals(metaData.get("REPORT_ID"))) {
data = new AarhusTrafficObservation(Double.parseDouble(streamData.get("REPORT_ID")),
Double.parseDouble(streamData.get("avgSpeed")), Double.parseDouble(streamData
.get("vehicleCount")), Double.parseDouble(streamData.get("avgMeasuredTime")),
0, 0, metaData.get("POINT_1_STREET"), metaData.get("POINT_1_CITY"),
Double.parseDouble(metaData.get("POINT_1_LAT")), Double.parseDouble(metaData
.get("POINT_1_LNG")), metaData.get("POINT_2_STREET"),
metaData.get("POINT_2_CITY"), Double.parseDouble(metaData.get("POINT_2_LAT")),
Double.parseDouble(metaData.get("POINT_2_LNG")), metaData.get("POINT_1_COUNTRY"),
metaData.get("POINT_2_COUNTRY"), metaData.get("TIMESTAMP"));
Double distance = Double.parseDouble(metaData.get("DISTANCE_IN_METERS"));
data.setEstimatedTime(distance / data.getAverageSpeed());
data.setCongestionLevel(data.getVehicle_count() / distance);
}
}
}
streamData.close();
metaData.close();
return data;
} catch (Exception e) {
e.printStackTrace();
}
return null;
}
public void testDoubleStringParsing() {
Double.parseDouble("9223372036854775804");
Double.parseDouble("9223372036854775805");
Double.parseDouble("9223372036854775806");
Double.parseDouble("9223372036854775807");
assertEquals(Long.MAX_VALUE, (long) Double.parseDouble(MAX_LONG_AS_STRING));
}
/**
* Implements the <tt>getDouble</tt> method as per the specification in
* {@link Preferences#getDouble(String,double)}.
*
* <p>This implementation invokes {@link #get(String,String) <tt>get(key,
* null)</tt>}. If the return value is non-null, the implementation
* attempts to translate it to an <tt>double</tt> with
* {@link Double#parseDouble(String)}. If the attempt succeeds, the return
* value is returned by this method. Otherwise, <tt>def</tt> is returned.
*
* @param key key whose associated value is to be returned as a double.
* @param def the value to be returned in the event that this
* preference node has no value associated with <tt>key</tt>
* or the associated value cannot be interpreted as a double.
* @return the double value represented by the string associated with
* <tt>key</tt> in this preference node, or <tt>def</tt> if the
* associated value does not exist or cannot be interpreted as
* a double.
* @throws IllegalStateException if this node (or an ancestor) has been
* removed with the {@link #removeNode()} method.
* @throws NullPointerException if <tt>key</tt> is <tt>null</tt>.
*/
public double getDouble(String key, double def) {
double result = def;
try {
String value = get(key, null);
if (value != null)
result = Double.parseDouble(value);
} catch (NumberFormatException e) {
// Ignoring exception causes specified default to be returned
}
return result;
}
/**
* Implements the <tt>getDouble</tt> method as per the specification in
* {@link Preferences#getDouble(String,double)}.
*
* <p>This implementation invokes {@link #get(String,String) <tt>get(key,
* null)</tt>}. If the return value is non-null, the implementation
* attempts to translate it to an <tt>double</tt> with
* {@link Double#parseDouble(String)}. If the attempt succeeds, the return
* value is returned by this method. Otherwise, <tt>def</tt> is returned.
*
* @param key key whose associated value is to be returned as a double.
* @param def the value to be returned in the event that this
* preference node has no value associated with <tt>key</tt>
* or the associated value cannot be interpreted as a double.
* @return the double value represented by the string associated with
* <tt>key</tt> in this preference node, or <tt>def</tt> if the
* associated value does not exist or cannot be interpreted as
* a double.
* @throws IllegalStateException if this node (or an ancestor) has been
* removed with the {@link #removeNode()} method.
* @throws NullPointerException if <tt>key</tt> is <tt>null</tt>.
*/
public double getDouble(String key, double def) {
double result = def;
try {
String value = get(key, null);
if (value != null)
result = Double.parseDouble(value);
} catch (NumberFormatException e) {
// Ignoring exception causes specified default to be returned
}
return result;
}
/**
* Implements the <tt>getDouble</tt> method as per the specification in
* {@link Preferences#getDouble(String,double)}.
*
* <p>This implementation invokes {@link #get(String,String) <tt>get(key,
* null)</tt>}. If the return value is non-null, the implementation
* attempts to translate it to an <tt>double</tt> with
* {@link Double#parseDouble(String)}. If the attempt succeeds, the return
* value is returned by this method. Otherwise, <tt>def</tt> is returned.
*
* @param key key whose associated value is to be returned as a double.
* @param def the value to be returned in the event that this
* preference node has no value associated with <tt>key</tt>
* or the associated value cannot be interpreted as a double.
* @return the double value represented by the string associated with
* <tt>key</tt> in this preference node, or <tt>def</tt> if the
* associated value does not exist or cannot be interpreted as
* a double.
* @throws IllegalStateException if this node (or an ancestor) has been
* removed with the {@link #removeNode()} method.
* @throws NullPointerException if <tt>key</tt> is <tt>null</tt>.
*/
public double getDouble(String key, double def) {
double result = def;
try {
String value = get(key, null);
if (value != null)
result = Double.parseDouble(value);
} catch (NumberFormatException e) {
// Ignoring exception causes specified default to be returned
}
return result;
}
/**
* Implements the <tt>getDouble</tt> method as per the specification in
* {@link Preferences#getDouble(String,double)}.
*
* <p>This implementation invokes {@link #get(String,String) <tt>get(key,
* null)</tt>}. If the return value is non-null, the implementation
* attempts to translate it to an <tt>double</tt> with
* {@link Double#parseDouble(String)}. If the attempt succeeds, the return
* value is returned by this method. Otherwise, <tt>def</tt> is returned.
*
* @param key key whose associated value is to be returned as a double.
* @param def the value to be returned in the event that this
* preference node has no value associated with <tt>key</tt>
* or the associated value cannot be interpreted as a double.
* @return the double value represented by the string associated with
* <tt>key</tt> in this preference node, or <tt>def</tt> if the
* associated value does not exist or cannot be interpreted as
* a double.
* @throws IllegalStateException if this node (or an ancestor) has been
* removed with the {@link #removeNode()} method.
* @throws NullPointerException if <tt>key</tt> is <tt>null</tt>.
*/
public double getDouble(String key, double def) {
double result = def;
try {
String value = get(key, null);
if (value != null)
result = Double.parseDouble(value);
} catch (NumberFormatException e) {
// Ignoring exception causes specified default to be returned
}
return result;
}
/**
* Implements the <tt>getDouble</tt> method as per the specification in
* {@link Preferences#getDouble(String,double)}.
*
* <p>This implementation invokes {@link #get(String,String) <tt>get(key,
* null)</tt>}. If the return value is non-null, the implementation
* attempts to translate it to an <tt>double</tt> with
* {@link Double#parseDouble(String)}. If the attempt succeeds, the return
* value is returned by this method. Otherwise, <tt>def</tt> is returned.
*
* @param key key whose associated value is to be returned as a double.
* @param def the value to be returned in the event that this
* preference node has no value associated with <tt>key</tt>
* or the associated value cannot be interpreted as a double.
* @return the double value represented by the string associated with
* <tt>key</tt> in this preference node, or <tt>def</tt> if the
* associated value does not exist or cannot be interpreted as
* a double.
* @throws IllegalStateException if this node (or an ancestor) has been
* removed with the {@link #removeNode()} method.
* @throws NullPointerException if <tt>key</tt> is <tt>null</tt>.
*/
public double getDouble(String key, double def) {
double result = def;
try {
String value = get(key, null);
if (value != null)
result = Double.parseDouble(value);
} catch (NumberFormatException e) {
// Ignoring exception causes specified default to be returned
}
return result;
}
/**
* Implements the <tt>getDouble</tt> method as per the specification in
* {@link Preferences#getDouble(String,double)}.
*
* <p>This implementation invokes {@link #get(String,String) <tt>get(key,
* null)</tt>}. If the return value is non-null, the implementation
* attempts to translate it to an <tt>double</tt> with
* {@link Double#parseDouble(String)}. If the attempt succeeds, the return
* value is returned by this method. Otherwise, <tt>def</tt> is returned.
*
* @param key key whose associated value is to be returned as a double.
* @param def the value to be returned in the event that this
* preference node has no value associated with <tt>key</tt>
* or the associated value cannot be interpreted as a double.
* @return the double value represented by the string associated with
* <tt>key</tt> in this preference node, or <tt>def</tt> if the
* associated value does not exist or cannot be interpreted as
* a double.
* @throws IllegalStateException if this node (or an ancestor) has been
* removed with the {@link #removeNode()} method.
* @throws NullPointerException if <tt>key</tt> is <tt>null</tt>.
*/
public double getDouble(String key, double def) {
double result = def;
try {
String value = get(key, null);
if (value != null)
result = Double.parseDouble(value);
} catch (NumberFormatException e) {
// Ignoring exception causes specified default to be returned
}
return result;
}
/**
* Implements the <tt>getDouble</tt> method as per the specification in
* {@link Preferences#getDouble(String,double)}.
*
* <p>This implementation invokes {@link #get(String,String) <tt>get(key,
* null)</tt>}. If the return value is non-null, the implementation
* attempts to translate it to an <tt>double</tt> with
* {@link Double#parseDouble(String)}. If the attempt succeeds, the return
* value is returned by this method. Otherwise, <tt>def</tt> is returned.
*
* @param key key whose associated value is to be returned as a double.
* @param def the value to be returned in the event that this
* preference node has no value associated with <tt>key</tt>
* or the associated value cannot be interpreted as a double.
* @return the double value represented by the string associated with
* <tt>key</tt> in this preference node, or <tt>def</tt> if the
* associated value does not exist or cannot be interpreted as
* a double.
* @throws IllegalStateException if this node (or an ancestor) has been
* removed with the {@link #removeNode()} method.
* @throws NullPointerException if <tt>key</tt> is <tt>null</tt>.
*/
public double getDouble(String key, double def) {
double result = def;
try {
String value = get(key, null);
if (value != null)
result = Double.parseDouble(value);
} catch (NumberFormatException e) {
// Ignoring exception causes specified default to be returned
}
return result;
}
/**
* Implements the {@code getDouble} method as per the specification in
* {@link Preferences#getDouble(String,double)}.
*
* <p>This implementation invokes {@link #get(String,String) get(key,
* null)}. If the return value is non-null, the implementation
* attempts to translate it to an {@code double} with
* {@link Double#parseDouble(String)}. If the attempt succeeds, the return
* value is returned by this method. Otherwise, {@code def} is returned.
*
* @param key key whose associated value is to be returned as a double.
* @param def the value to be returned in the event that this
* preference node has no value associated with {@code key}
* or the associated value cannot be interpreted as a double.
* @return the double value represented by the string associated with
* {@code key} in this preference node, or {@code def} if the
* associated value does not exist or cannot be interpreted as
* a double.
* @throws IllegalStateException if this node (or an ancestor) has been
* removed with the {@link #removeNode()} method.
* @throws NullPointerException if {@code key} is {@code null}.
* @throws IllegalArgumentException if key contains the null control
* character, code point U+0000.
*/
public double getDouble(String key, double def) {
double result = def;
try {
String value = get(key, null);
if (value != null)
result = Double.parseDouble(value);
} catch (NumberFormatException e) {
// Ignoring exception causes specified default to be returned
}
return result;
}
/**
* Implements the <tt>getDouble</tt> method as per the specification in
* {@link Preferences#getDouble(String,double)}.
*
* <p>This implementation invokes {@link #get(String,String) <tt>get(key,
* null)</tt>}. If the return value is non-null, the implementation
* attempts to translate it to an <tt>double</tt> with
* {@link Double#parseDouble(String)}. If the attempt succeeds, the return
* value is returned by this method. Otherwise, <tt>def</tt> is returned.
*
* @param key key whose associated value is to be returned as a double.
* @param def the value to be returned in the event that this
* preference node has no value associated with <tt>key</tt>
* or the associated value cannot be interpreted as a double.
* @return the double value represented by the string associated with
* <tt>key</tt> in this preference node, or <tt>def</tt> if the
* associated value does not exist or cannot be interpreted as
* a double.
* @throws IllegalStateException if this node (or an ancestor) has been
* removed with the {@link #removeNode()} method.
* @throws NullPointerException if <tt>key</tt> is <tt>null</tt>.
*/
public double getDouble(String key, double def) {
double result = def;
try {
String value = get(key, null);
if (value != null)
result = Double.parseDouble(value);
} catch (NumberFormatException e) {
// Ignoring exception causes specified default to be returned
}
return result;
}
/**
* Implements the <tt>getDouble</tt> method as per the specification in
* {@link Preferences#getDouble(String,double)}.
*
* <p>This implementation invokes {@link #get(String,String) <tt>get(key,
* null)</tt>}. If the return value is non-null, the implementation
* attempts to translate it to an <tt>double</tt> with
* {@link Double#parseDouble(String)}. If the attempt succeeds, the return
* value is returned by this method. Otherwise, <tt>def</tt> is returned.
*
* @param key key whose associated value is to be returned as a double.
* @param def the value to be returned in the event that this
* preference node has no value associated with <tt>key</tt>
* or the associated value cannot be interpreted as a double.
* @return the double value represented by the string associated with
* <tt>key</tt> in this preference node, or <tt>def</tt> if the
* associated value does not exist or cannot be interpreted as
* a double.
* @throws IllegalStateException if this node (or an ancestor) has been
* removed with the {@link #removeNode()} method.
* @throws NullPointerException if <tt>key</tt> is <tt>null</tt>.
*/
public double getDouble(String key, double def) {
double result = def;
try {
String value = get(key, null);
if (value != null)
result = Double.parseDouble(value);
} catch (NumberFormatException e) {
// Ignoring exception causes specified default to be returned
}
return result;
}
/**
* Implements the <tt>getDouble</tt> method as per the specification in
* {@link Preferences#getDouble(String,double)}.
*
* <p>This implementation invokes {@link #get(String,String) <tt>get(key,
* null)</tt>}. If the return value is non-null, the implementation
* attempts to translate it to an <tt>double</tt> with
* {@link Double#parseDouble(String)}. If the attempt succeeds, the return
* value is returned by this method. Otherwise, <tt>def</tt> is returned.
*
* @param key key whose associated value is to be returned as a double.
* @param def the value to be returned in the event that this
* preference node has no value associated with <tt>key</tt>
* or the associated value cannot be interpreted as a double.
* @return the double value represented by the string associated with
* <tt>key</tt> in this preference node, or <tt>def</tt> if the
* associated value does not exist or cannot be interpreted as
* a double.
* @throws IllegalStateException if this node (or an ancestor) has been
* removed with the {@link #removeNode()} method.
* @throws NullPointerException if <tt>key</tt> is <tt>null</tt>.
*/
public double getDouble(String key, double def) {
double result = def;
try {
String value = get(key, null);
if (value != null)
result = Double.parseDouble(value);
} catch (NumberFormatException e) {
// Ignoring exception causes specified default to be returned
}
return result;
}
/**
* Implements the <tt>getDouble</tt> method as per the specification in
* {@link Preferences#getDouble(String,double)}.
*
* <p>This implementation invokes {@link #get(String,String) <tt>get(key,
* null)</tt>}. If the return value is non-null, the implementation
* attempts to translate it to an <tt>double</tt> with
* {@link Double#parseDouble(String)}. If the attempt succeeds, the return
* value is returned by this method. Otherwise, <tt>def</tt> is returned.
*
* @param key key whose associated value is to be returned as a double.
* @param def the value to be returned in the event that this
* preference node has no value associated with <tt>key</tt>
* or the associated value cannot be interpreted as a double.
* @return the double value represented by the string associated with
* <tt>key</tt> in this preference node, or <tt>def</tt> if the
* associated value does not exist or cannot be interpreted as
* a double.
* @throws IllegalStateException if this node (or an ancestor) has been
* removed with the {@link #removeNode()} method.
* @throws NullPointerException if <tt>key</tt> is <tt>null</tt>.
*/
public double getDouble(String key, double def) {
double result = def;
try {
String value = get(key, null);
if (value != null)
result = Double.parseDouble(value);
} catch (NumberFormatException e) {
// Ignoring exception causes specified default to be returned
}
return result;
}
/**
* Implements the <tt>getDouble</tt> method as per the specification in
* {@link Preferences#getDouble(String,double)}.
*
* <p>This implementation invokes {@link #get(String,String) <tt>get(key,
* null)</tt>}. If the return value is non-null, the implementation
* attempts to translate it to an <tt>double</tt> with
* {@link Double#parseDouble(String)}. If the attempt succeeds, the return
* value is returned by this method. Otherwise, <tt>def</tt> is returned.
*
* @param key key whose associated value is to be returned as a double.
* @param def the value to be returned in the event that this
* preference node has no value associated with <tt>key</tt>
* or the associated value cannot be interpreted as a double.
* @return the double value represented by the string associated with
* <tt>key</tt> in this preference node, or <tt>def</tt> if the
* associated value does not exist or cannot be interpreted as
* a double.
* @throws IllegalStateException if this node (or an ancestor) has been
* removed with the {@link #removeNode()} method.
* @throws NullPointerException if <tt>key</tt> is <tt>null</tt>.
*/
public double getDouble(String key, double def) {
double result = def;
try {
String value = get(key, null);
if (value != null)
result = Double.parseDouble(value);
} catch (NumberFormatException e) {
// Ignoring exception causes specified default to be returned
}
return result;
}
/**
* Implements the <tt>getDouble</tt> method as per the specification in
* {@link Preferences#getDouble(String,double)}.
*
* <p>This implementation invokes {@link #get(String,String) <tt>get(key,
* null)</tt>}. If the return value is non-null, the implementation
* attempts to translate it to an <tt>double</tt> with
* {@link Double#parseDouble(String)}. If the attempt succeeds, the return
* value is returned by this method. Otherwise, <tt>def</tt> is returned.
*
* @param key key whose associated value is to be returned as a double.
* @param def the value to be returned in the event that this
* preference node has no value associated with <tt>key</tt>
* or the associated value cannot be interpreted as a double.
* @return the double value represented by the string associated with
* <tt>key</tt> in this preference node, or <tt>def</tt> if the
* associated value does not exist or cannot be interpreted as
* a double.
* @throws IllegalStateException if this node (or an ancestor) has been
* removed with the {@link #removeNode()} method.
* @throws NullPointerException if <tt>key</tt> is <tt>null</tt>.
*/
public double getDouble(String key, double def) {
double result = def;
try {
String value = get(key, null);
if (value != null)
result = Double.parseDouble(value);
} catch (NumberFormatException e) {
// Ignoring exception causes specified default to be returned
}
return result;
}
/**
* Implements the <tt>getDouble</tt> method as per the specification in
* {@link Preferences#getDouble(String,double)}.
*
* <p>This implementation invokes {@link #get(String,String) <tt>get(key,
* null)</tt>}. If the return value is non-null, the implementation
* attempts to translate it to an <tt>double</tt> with
* {@link Double#parseDouble(String)}. If the attempt succeeds, the return
* value is returned by this method. Otherwise, <tt>def</tt> is returned.
*
* @param key key whose associated value is to be returned as a double.
* @param def the value to be returned in the event that this
* preference node has no value associated with <tt>key</tt>
* or the associated value cannot be interpreted as a double.
* @return the double value represented by the string associated with
* <tt>key</tt> in this preference node, or <tt>def</tt> if the
* associated value does not exist or cannot be interpreted as
* a double.
* @throws IllegalStateException if this node (or an ancestor) has been
* removed with the {@link #removeNode()} method.
* @throws NullPointerException if <tt>key</tt> is <tt>null</tt>.
*/
public double getDouble(String key, double def) {
double result = def;
try {
String value = get(key, null);
if (value != null)
result = Double.parseDouble(value);
} catch (NumberFormatException e) {
// Ignoring exception causes specified default to be returned
}
return result;
}
/**
* Implements the <tt>getDouble</tt> method as per the specification in
* {@link Preferences#getDouble(String,double)}.
*
* <p>This implementation invokes {@link #get(String,String) <tt>get(key,
* null)</tt>}. If the return value is non-null, the implementation
* attempts to translate it to an <tt>double</tt> with
* {@link Double#parseDouble(String)}. If the attempt succeeds, the return
* value is returned by this method. Otherwise, <tt>def</tt> is returned.
*
* @param key key whose associated value is to be returned as a double.
* @param def the value to be returned in the event that this
* preference node has no value associated with <tt>key</tt>
* or the associated value cannot be interpreted as a double.
* @return the double value represented by the string associated with
* <tt>key</tt> in this preference node, or <tt>def</tt> if the
* associated value does not exist or cannot be interpreted as
* a double.
* @throws IllegalStateException if this node (or an ancestor) has been
* removed with the {@link #removeNode()} method.
* @throws NullPointerException if <tt>key</tt> is <tt>null</tt>.
*/
public double getDouble(String key, double def) {
double result = def;
try {
String value = get(key, null);
if (value != null)
result = Double.parseDouble(value);
} catch (NumberFormatException e) {
// Ignoring exception causes specified default to be returned
}
return result;
}
/**
* Implements the <tt>getDouble</tt> method as per the specification in
* {@link Preferences#getDouble(String,double)}.
*
* <p>This implementation invokes {@link #get(String,String) <tt>get(key,
* null)</tt>}. If the return value is non-null, the implementation
* attempts to translate it to an <tt>double</tt> with
* {@link Double#parseDouble(String)}. If the attempt succeeds, the return
* value is returned by this method. Otherwise, <tt>def</tt> is returned.
*
* @param key key whose associated value is to be returned as a double.
* @param def the value to be returned in the event that this
* preference node has no value associated with <tt>key</tt>
* or the associated value cannot be interpreted as a double.
* @return the double value represented by the string associated with
* <tt>key</tt> in this preference node, or <tt>def</tt> if the
* associated value does not exist or cannot be interpreted as
* a double.
* @throws IllegalStateException if this node (or an ancestor) has been
* removed with the {@link #removeNode()} method.
* @throws NullPointerException if <tt>key</tt> is <tt>null</tt>.
*/
public double getDouble(String key, double def) {
double result = def;
try {
String value = get(key, null);
if (value != null)
result = Double.parseDouble(value);
} catch (NumberFormatException e) {
// Ignoring exception causes specified default to be returned
}
return result;
}