Labeled "continue" Statements

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∟Labeled "continue" Statements

This section describes labeled 'continue' statement, which is a branching statement that transfers the control to the end of the labeled enclosing loop block and continues the next iteration of the labeled loop.

What Is Labeled "continue" Statement? - A labeled "continue" statement is a branching statement that transfers the control to the end of the labeled enclosing loop block and continues the next iteration of the labeled loop.

Here is the syntax for a labeled "continue" statement.

loop_label : while|do|for ... { // "continue" continues here
   ...
   while|do|for ... {
      ...
      continue loop_label
      ...
   }
   ...
}

Labeled "continue" statements extend usages of non-labeled "continue" statements in 1 situation:

Continue the next iteration of a parent loop of the immediate enclosing loop.

Here is a sample program that shows you how to use labeled "continue" statements:

/* LabeledContinueStatementTest.java
 * Copyright (c) HerongYang.com. All Rights Reserved.
 */
import java.io.*;
import java.nio.file.*;
import java.time.*;
class LabeledContinueStatementTest {
   public static void main(String[] arg) {
      java.io.PrintStream out = System.out;

      out.println("Labeled \"continue\" statement for outer loop:");
      loopOuter: for (int i = 3; i < 20; i++) {
         boolean isPrime = true;
         int j = 2;
         while (j < i) {
            isPrime = i%j > 0;
            if (!isPrime) continue loopOuter;
            j++;
         }
         out.println("   "+i+" is a prime number.");
      }
   }
}

If you compile and run the above program, you will see:

herong> java LabeledContinueStatementTest.java

Labeled "continue" statement for outer loop:
   3 is a prime number.
   5 is a prime number.
   7 is a prime number.
   11 is a prime number.
   13 is a prime number.
   17 is a prime number.
   19 is a prime number.