下面列出了java.util.concurrent.atomic.LongAccumulator#accumulate() 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。
public static void main(String[] args) throws InterruptedException {
LongAccumulator accumulator = new LongAccumulator(Long::max, Long.MIN_VALUE);
Thread[] ts = new Thread[1000];
for(int i=0;i<1000;i++){
ts[i] = new Thread(()->{
Random random = new Random();
long value = random.nextLong();
accumulator.accumulate(value);
});
ts[i].start();
}
for(int i=0;i<1000;i++){
ts[i].join();
}
System.out.println(accumulator.longValue());
}
public static void main(String[] args) throws Exception{
LongAccumulator accumulator=new LongAccumulator(Long::max,Long.MIN_VALUE);
Thread[] ts=new Thread[100];
for(int i=0;i<100;i++){
ts[i]=new Thread(()->{
Random random=new Random();
long value=random.nextLong();
accumulator.accumulate(value);
});
ts[i].start();
}
for(int i=0;i<100;i++){
ts[i].join();
}
System.out.println(accumulator.longValue());
}
/**
* longValue returns current value.
*/
public void testLongValue() {
LongAccumulator ai = new LongAccumulator(Long::max, 0L);
assertEquals(0, ai.longValue());
ai.accumulate(1);
assertEquals(1, ai.longValue());
}
static void testLongAccumulator() {
LongBinaryOperator plus = (LongBinaryOperator & Serializable) (x, y) -> x + y;
LongAccumulator a = new LongAccumulator(plus, -2);
a.accumulate(34);
LongAccumulator result = echo(a);
if (result.get() != a.get())
throw new RuntimeException("Unexpected value");
a.reset();
result.reset();
if (result.get() != a.get())
throw new RuntimeException("Unexpected value after reset");
checkSerialClassName(a, "java.util.concurrent.atomic.LongAccumulator$SerializationProxy");
}
/**
* accumulate accumulates given value to current, and get returns current value
*/
public void testAccumulateAndGet() {
LongAccumulator ai = new LongAccumulator(Long::max, 0L);
ai.accumulate(2);
assertEquals(2, ai.get());
ai.accumulate(-4);
assertEquals(2, ai.get());
ai.accumulate(4);
assertEquals(4, ai.get());
}
static void testLongAccumulator() {
LongBinaryOperator plus = (LongBinaryOperator & Serializable) (x, y) -> x + y;
LongAccumulator a = new LongAccumulator(plus, -2);
a.accumulate(34);
LongAccumulator result = echo(a);
if (result.get() != a.get())
throw new RuntimeException("Unexpected value");
a.reset();
result.reset();
if (result.get() != a.get())
throw new RuntimeException("Unexpected value after reset");
checkSerialClassName(a, "java.util.concurrent.atomic.LongAccumulator$SerializationProxy");
}
static void testLongAccumulator() {
LongBinaryOperator plus = (LongBinaryOperator & Serializable) (x, y) -> x + y;
LongAccumulator a = new LongAccumulator(plus, -2);
a.accumulate(34);
LongAccumulator result = echo(a);
if (result.get() != a.get())
throw new RuntimeException("Unexpected value");
a.reset();
result.reset();
if (result.get() != a.get())
throw new RuntimeException("Unexpected value after reset");
checkSerialClassName(a, "java.util.concurrent.atomic.LongAccumulator$SerializationProxy");
}
/**
* getThenReset() returns current value; subsequent get() returns zero
*/
public void testGetThenReset() {
LongAccumulator ai = new LongAccumulator(Long::max, 0L);
ai.accumulate(2);
assertEquals(2, ai.get());
assertEquals(2, ai.getThenReset());
assertEquals(0, ai.get());
}
static void testLongAccumulator() {
LongBinaryOperator plus = (LongBinaryOperator & Serializable) (x, y) -> x + y;
LongAccumulator a = new LongAccumulator(plus, -2);
a.accumulate(34);
LongAccumulator result = echo(a);
if (result.get() != a.get())
throw new RuntimeException("Unexpected value");
a.reset();
result.reset();
if (result.get() != a.get())
throw new RuntimeException("Unexpected value after reset");
checkSerialClassName(a, "java.util.concurrent.atomic.LongAccumulator$SerializationProxy");
}
/**
* doubleValue returns current value.
*/
public void testDoubleValue() {
LongAccumulator ai = new LongAccumulator(Long::max, 0L);
assertEquals(0.0, ai.doubleValue());
ai.accumulate(1);
assertEquals(1.0, ai.doubleValue());
}
/**
* reset() causes subsequent get() to return zero
*/
public void testReset() {
LongAccumulator ai = new LongAccumulator(Long::max, 0L);
ai.accumulate(2);
assertEquals(2, ai.get());
ai.reset();
assertEquals(0, ai.get());
}
public void run() {
phaser.arriveAndAwaitAdvance();
LongAccumulator a = acc;
for (int i = 0; i < incs; ++i)
a.accumulate(i);
result = a.get();
phaser.arrive();
}
/**
* toString returns current value.
*/
public void testToString() {
LongAccumulator ai = new LongAccumulator(Long::max, 0L);
assertEquals("0", ai.toString());
ai.accumulate(1);
assertEquals(Long.toString(1), ai.toString());
}
/**
* reset() causes subsequent get() to return zero
*/
public void testReset() {
LongAccumulator ai = new LongAccumulator(Long::max, 0L);
ai.accumulate(2);
assertEquals(2, ai.get());
ai.reset();
assertEquals(0, ai.get());
}
/**
* longValue returns current value.
*/
public void testLongValue() {
LongAccumulator ai = new LongAccumulator(Long::max, 0L);
assertEquals(0, ai.longValue());
ai.accumulate(1);
assertEquals(1, ai.longValue());
}
static void testLongAccumulator() {
LongBinaryOperator plus = (LongBinaryOperator & Serializable) (x, y) -> x + y;
LongAccumulator a = new LongAccumulator(plus, -2);
a.accumulate(34);
LongAccumulator result = echo(a);
if (result.get() != a.get())
throw new RuntimeException("Unexpected value");
a.reset();
result.reset();
if (result.get() != a.get())
throw new RuntimeException("Unexpected value after reset");
checkSerialClassName(a, "java.util.concurrent.atomic.LongAccumulator$SerializationProxy");
}
/**
* doubleValue returns current value.
*/
public void testDoubleValue() {
LongAccumulator ai = new LongAccumulator(Long::max, 0L);
assertEquals(0.0, ai.doubleValue());
ai.accumulate(1);
assertEquals(1.0, ai.doubleValue());
}
public void run() {
phaser.arriveAndAwaitAdvance();
LongAccumulator a = acc;
for (int i = 0; i < incs; ++i)
a.accumulate(i);
result = a.get();
phaser.arrive();
}
static void testLongAccumulator() {
LongBinaryOperator plus = (LongBinaryOperator & Serializable) (x, y) -> x + y;
LongAccumulator a = new LongAccumulator(plus, -2);
a.accumulate(34);
LongAccumulator result = echo(a);
if (result.get() != a.get())
throw new RuntimeException("Unexpected value");
a.reset();
result.reset();
if (result.get() != a.get())
throw new RuntimeException("Unexpected value after reset");
checkSerialClassName(a, "java.util.concurrent.atomic.LongAccumulator$SerializationProxy");
}
static void testLongAccumulator() {
LongBinaryOperator plus = (LongBinaryOperator & Serializable) (x, y) -> x + y;
LongAccumulator a = new LongAccumulator(plus, -2);
a.accumulate(34);
LongAccumulator result = echo(a);
if (result.get() != a.get())
throw new RuntimeException("Unexpected value");
a.reset();
result.reset();
if (result.get() != a.get())
throw new RuntimeException("Unexpected value after reset");
checkSerialClassName(a, "java.util.concurrent.atomic.LongAccumulator$SerializationProxy");
}