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AtomicInteger incrementAndGet() method in Java with examples

  • Last Updated : 29 Jan, 2019

The java.util.concurrent.atomic.AtomicInteger.incrementAndGet() is an inbuilt method in java that increases the previous value by one and returns the value after updation which is of data-type int.

Syntax:

public final int incrementAndGet()

Parameters: The function does not accepts a single parameter.

Return value: The function returns the value after increment operation is performed to the previous value.

Program below demonstrates the function:



Program 1:




// 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);
  
        // Incremenet and get
        int res
            = val.incrementAndGet();
  
        // Prints the updated value
        System.out.println("Current value: "
                           + res);
    }
}
Output:
Previous value: 0
Current value: 1

Program 2:




// 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);
  
        // Incremenet and get new value
        int res = val.incrementAndGet();
  
        // Prints the updated value
        System.out.println("Current value: "
                           + res);
    }
}
Output:
Previous value: 18
Current value: 19

Reference: https://docs.oracle.com/javase/8/docs/api/java/util/concurrent/atomic/AtomicInteger.html#incrementAndGet–

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