How to Increment a class Integer references value in java from another method

Question

package myintergertest;

/**
 *
 * @author Engineering
 */
public class Main {

    /**
     * @param args the command line arguments
     */
    public static void          


        

Answer 1

public class passByReferenceExample {
    static void incrementIt(Long b[]){
        Long c = b[0];
        c=c+1;
        b[0]=c;

    }
    public static void main(String[] args) {
        Long a[]={1L};  

        System.out.println("Before calling IncrementIt() : " + a[0]);
        System.out.println();
        incrementIt(a);
        System.out.println("after first call to incrementIt() : " + a[0]);
        incrementIt(a);
        System.out.println("after second call to incrementIt(): "+ a[0]);
        incrementIt(a);
        System.out.println("after third call to incrementIt() : "+ a[0]);
        incrementIt(a);
        System.out.println("after fourth  call to incrementIt(): "+ a[0]);    
    }
}

output:

Before calling IncrementIt() : 1

after first call to incrementIt() : 2
after second call to incrementIt(): 3
after third call to incrementIt() : 4
after fourth  call to incrementIt(): 5