Explanation:
public class AllCombinations {
public static void main (String [] args) {
//Declaring the variables
char a1;
char b1;
char c1;
//Assigning characters to form combinations
a1 = 'x';
b1 = 'y';
c1 = 'z';
//Printing the combinations
System.out.print("" + a1 + b1 + c1 + "\n " + a1 + c1 + b1 + "\n" + b1 + a1 + c1 +"\n" + b1 + c1 + a1 + "\n " + c1 + a1 + b1 + "\n " + c1 + b1 + a1);
}
}