Answer Posted / vvsatya.

package dv.java;

public class ItrateFourNumbers {
int i=1;int j=2;int k=3;int l=4;int temp=0;


public ItrateFourNumbers() {

}
void klSwap(){
temp=k;
k=l;
l=temp;
System.out.println(i+""+j+""+k+""+l);
}
void itrateFourNum(){

for (int m = 0; m <=3; m++) {

klSwap();

klSwap();

temp=j;
j=k;
k=l;
l=temp;
System.out.println(i+""+j+""+k+""+l);

klSwap();

temp=j;
j=l;
l=k;
k=temp;
System.out.println(i+""+j+""+k+""+l);

klSwap();

temp=k;
k=j;
j=l;
l=i;
i=temp;
System.out.println(" ");

}

}

public static void main(String[] args) {
ItrateFourNumbers ifn= new ItrateFourNumbers();
ifn.itrateFourNum();
}

}

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