Possible Duplicate:
Breaking out of nested loops in Java
How can I use break and/or continue statements to return to the first line of the while loop at points 1, 2 and 3, for example, as indicated in the pseudocode?
Suppose I have a scenario reminiscent of the following:
while(condition) { // want to return to this point for (Integer x : xs) { // point 1 for (Integer y : ys) { // point 2 ... } ... } for (Integer a : as) { for (Integer b : bs) { // point 3 ... } ... } } Use a label such as :
outer: while(condition) { // want to return to this point for (Integer x : xs) { // point 1 for (Integer y : ys) { // point 2 ... } ... } for (Integer a : as) { for (Integer b : bs) { // point 3 ... } ... } }
and you can then use break outer; to escape the while loop. This works with nested for loops as well, but I try not to overuse labels
As pointed out by @Peter, use continue outer; if you wish to finish the current outer iteration early and continue on to the next, as opposed to escaping the while loop.
continue outer; Break will exit that loop as well.
You can do that :
here: while(condition) { for (Integer x : xs) { // point 1 for (Integer y : ys) { break here; } } The break statement, with or without label, is described in the Java specification :
A break statement with no label attempts to transfer control to the innermost enclosing switch, while, do, or for statement of the immediately enclosing method or initializer; this statement, which is called the break target, then immediately completes normally.
A break statement with label Identifier attempts to transfer control to the enclosing labeled statement (§14.7) that has the same Identifier as its label; this statement, which is called the break target, then immediately completes normally. In this case, the break target need not be a switch, while, do, or for statement.
loop: while(condition) { // want to return to this point for (Integer x : xs) { continue loop: for (Integer y : ys) { continue loop: ... } ... } for (Integer a : as) { for (Integer b : bs) { continue loop: ... } ... } }
label your Loops with syntax
LABEL: LoopType and later you can use Break Statement to get out of a certain loop with break LABEL;.
OUT: while(somecond){ IN:for(...) { INNER: for(...){ break IN;// will get you outta IN and INNER for loop } } } yes, you can use the break statement with a label:
SOME_LABEL: // ... some code here break SOME_LABEL; used sparingly, this is a clean way to break out of multiple nested loops.
You could do like this posted here stackoverflow.com/questions/886955/breaking-out-of-nested-loops-in-java handles the same question.
