org.sonar.l10n.java.rules.squid.LabelsShouldNotBeUsedCheck.html Maven / Gradle / Ivy

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Labels are not commonly used in Java, and many developers do not understand how they work.
Moreover, their usage make the control flow harder to follow, which reduces the code's readability.



The following code:


int matrix[][] = {
  {1, 2, 3},
  {4, 5, 6},
  {7, 8, 9}
};

outer: for (int row = 0; row < matrix.length; row++) {   // Non-Compliant
  for (int col = 0; col < matrix[row].length; col++) {
    if (col == row) {
      continue outer;
    }
    System.out.println(matrix[row][col]);                // Prints the elements under the diagonal, i.e. 4, 7 and 8
  }
}



should be refactored into:


for (int row = 1; row < matrix.length; row++) {          // Compliant
  for (int col = 0; col < row; col++) {
    System.out.println(matrix[row][col]);                // Also prints 4, 7 and 8
  }
}