BREAKING OUT OF NESTED LOOPS IN JAVA

Royce Roy

Total Post:149

Points:1043
Posted by  Royce Roy
Java  Loop 
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I've got a nested loop construct like this:

for (Type type : types) {
    for (Type t : types2) {
         if (some condition) {
             // Do something and break...
             break; // Breaks out of the inner loop
         }
    }
}
Now how can I break out of both loops. I've looked at similar questions, but none concerns Java specifically. I couldn't apply these solutions because most used gotos.

I don't want to put the inner loop in a different method.

Update: I don't want to rerun the loops, when breaking I'm finished with the execution of the loop block.
  1. Mayank Tripathi

    Post:397

    Points:3117
    Re: Breaking out of nested loops in Java

    You can use break with a label for the outer loop. For example:

    public class Test {
      public static void main(String[] args) {
        outerloop:
        for (int i=0; i < 5; i++) {
          for (int j=0; j < 5; j++) {
            if (i * j > 6) {
              System.out.println("Breaking");
              break outerloop;
            }
            System.out.println(i + " " + j);
          }
        }
        System.out.println("Done");
      }
    }
    This prints:

    0 0
    0 1
    0 2
    0 3
    0 4
    1 0
    1 1
    1 2
    1 3
    1 4
    2 0
    2 1
    2 2
    2 3
    Breaking
    Done      

    2)you can use labels;
    label1 : for(int i =0;;)
    {
         for(int g =0;;)
         {
             break label1;
         }
    }      

    3)You can use a named block around the loops:
    search: {
        for (Type type : types) {
            for (Type t : types2) {
                if (some condition) {
                    // Do something and break...
                    break search;
                }
            }
        }
    }                                                            

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