public class Hamburger { public static void main(String[] args) { String s,t,u,v,z; s = "ham"; t = "burger"; u = s.concat(t); v = u.substring(0,3); z = u.substring(3); System.out.println("s = ".concat(s)); System.out.println("t = ".concat(t)); System.out.println("u = ".concat(u)); System.out.println("v = ".concat(v)); System.out.println("z = ".concat(z)); } }