Java AtomicLong getAndSet() 方法

2025 年 3 月 20 日 | 阅读 2 分钟

Java AtomicLong 类的 getAndSet() 方法原子地将值设置为 newValue，并返回旧值

语法

参数

newValue - 新值

返回值

先前的值

示例 1

import java.util.concurrent.atomic.AtomicLong;
public class AtomicLongGetAndSetExample1 {
	public static void main (String [] args) {
		AtomicLong atomiclong = new AtomicLong();
		//Returns the previous value
		Long result = atomiclong.getAndSet(10);
		//Prints the previous value
		System.out.println("Previous Value : " + result);
		//Sets and prints the New Value
		System.out.println("New Value : " + atomiclong);
	}
}

输出

Previous Value : 0
New Value : 10

示例 2

import java.util.concurrent.atomic.AtomicLong;
public class AtomicLongGetAndSetExample2 {
	public static void main (String [] args) {
		AtomicLong atomiclong = new AtomicLong(5);
		//Returns the previous value
		Long result = atomiclong.getAndSet(10);
		//Prints the previous value
		System.out.println("Previous Value : " + result);
		//Sets and prints the New Value
		System.out.println("New Value : " + atomiclong);
	}
}

输出

Previous Value : 5
New Value : 10

示例 3

import java.util.concurrent.atomic.AtomicLong;
public class AtomicLongGetAndSetExample3 {
	public static void main (String [] args) {
		AtomicLong atomiclong = new AtomicLong(-10);
		//Returns the previous value
		Long result = atomiclong.getAndSet(20);
		//Prints the previous value
		System.out.println("Previous Value : " + result);
		//Sets and prints the New Value
		System.out.println("New Value : " + atomiclong);
	}
}

输出

Previous Value : -10
New Value : 20

示例 4

import java.util.concurrent.atomic.AtomicLong;
public class AtomicLongGetAndSetExample4 {
	public static void main (String [] args) {
		AtomicLong atomiclong = new AtomicLong(-5);
		//Returns the previous value
		Long result = atomiclong.getAndSet(-10);
		//Prints the previous value
		System.out.println("Previous Value : " + result);
		//Sets and prints the New Value
		System.out.println("New Value : " + atomiclong);
	}
}

输出

Previous Value : -5
New Value : -10

下一主题Java AtomicLong 类

Java AtomicLong getAndSet() 方法

语法

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示例 1

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Java AtomicLong getAndSet() 方法

语法

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示例 1

示例 2

示例 3

示例 4

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