Java中的 AtomicInteger incrementAndGet() 方法及示例
Java.util.concurrent.atomic.AtomicInteger.incrementAndGet()是Java中的一个内置方法,它将先前的值加一并返回更新后的值,该值是数据类型int 。
句法:
public final int incrementAndGet()
参数:该函数不接受单个参数。
返回值:函数将递增操作后的值返回到前一个值。
下面的程序演示了该函数:
方案一:
Java
// Java program that demonstrates
// the incrementAndGet() function
import java.util.concurrent.atomic.AtomicInteger;
public class GFG {
public static void main(String args[])
{
// Initially value as 0
AtomicInteger val
= new AtomicInteger(0);
System.out.println("Previous value: "
+ val);
// Increment and get
int res
= val.incrementAndGet();
// Prints the updated value
System.out.println("Current value: "
+ res);
}
}
Java
// Java program that demonstrates
// the incrementAndGet() function
import java.util.concurrent.atomic.AtomicInteger;
public class GFG {
public static void main(String args[])
{
// Initially value as 18
AtomicInteger val
= new AtomicInteger(18);
System.out.println("Previous value: "
+ val);
// Increment and get new value
int res = val.incrementAndGet();
// Prints the updated value
System.out.println("Current value: "
+ res);
}
}
输出:
Previous value: 0
Current value: 1
方案二:
Java
// Java program that demonstrates
// the incrementAndGet() function
import java.util.concurrent.atomic.AtomicInteger;
public class GFG {
public static void main(String args[])
{
// Initially value as 18
AtomicInteger val
= new AtomicInteger(18);
System.out.println("Previous value: "
+ val);
// Increment and get new value
int res = val.incrementAndGet();
// Prints the updated value
System.out.println("Current value: "
+ res);
}
}
输出:
Previous value: 18
Current value: 19
参考: https: Java/util/concurrent/atomic/AtomicInteger.html#incrementAndGet-