Question:

I have created a while loop which can't seem to run properly. it calls a method from another class which helps change the stop condition for my program. It calls the method about 3 - 8 times on average and never reaches the stopping condition, however it stops.

public class useExample { public static void main(String[] args) { Example ex = new Example(); long [] result; long a = 0; long b = 0; long c = 0; long d = 0; long e = 0; int count = 0; int a1 = 1; int b1 = 2; int c1 = 3; int d1 = 4; int e1 = 5; for(int i = 0; i <1; i++) { while(a != a1 && b != b1 && c != c1 && d != d1 && e != e1) { result = ex.getOnes(); a = result[0]; b = result[1]; c = result[2]; d = result[3]; e = result[4]; System.out.println(result[0] + " " + result[1] + " " + result[2] + " " + result[3] + " " + result[4]); System.out.println(a + " " + b + " " + c + " " + d + " " + e + " " + count++); } System.out.println(a + " " + b + " " + c + " " + d + " " + e + " "+ count); } } }

The Example class is a follows:

import java.util.*; public class Example { Random r = new Random(); public long[] getOnes(){ int a = r.nextInt(35); int b = r.nextInt(35); int c = r.nextInt(35); int d = r.nextInt(35); int e = r.nextInt(35); while(a == 0) { a = r.nextInt(35); //temp[0] = a; } while(b == 0 || b == a /*|| b == c || b == d || b == e*/) { b = r.nextInt(35); //temp[1] = b; } while(c == 0 || c == a || c == b /*|| c == d || c == e*/) { c = r.nextInt(35); //temp[2] = c; } while(d == 0 || d == a || d == b || d == c/*|| d == e*/) { d = r.nextInt(35); //temp[3] = d; } while(e == 0 || e == a || e == b || e == c|| e == d) { e = r.nextInt(35); //temp[4] = e; } return new long[] {a, b, c, d, e}; } }

The while loop of the useExample class should only stop when each condtion of the while is false.This means when:

a == a1 b == b1 c == c1 d == d1 e == e1

It should output how many while loops it went through and the values of each loop. eventually outputting the same values of a1 to e1.

"The while loop of the useExample class should only stop when each condition of the while is false."

Using "&&" in while(a != a1 && b != b1 && c != c1 && d != d1 && e != e1){...} means that if only one condition is false e.g. (a != a1)==false, the whole condition will be false.

if you want the loop to run until all conditions are false, you should use "||" instead of "&&".