Unused Code Rules

The Unused Code Ruleset contains a collection of rules that find unused code.

UnusedPrivateField

Detects when a private field is declared and/or assigned a value, but not used.

This rule is defined by the following Java class: net.sourceforge.pmd.rules.UnusedPrivateFieldRule

Here's an example of code that would trigger this rule:

			

public class Something {
  private static int FOO = 2; // Unused
  private int i = 5; // Unused
  private int j = 6;
  public int addOne() {
    return j++;
  }
}

UnusedLocalVariable

Detects when a local variable is declared and/or assigned, but not used.

This rule is defined by the following Java class: net.sourceforge.pmd.rules.UnusedLocalVariableRule

Here's an example of code that would trigger this rule:

			

public void doSomething() {
  int i = 5; // Unused
}

UnusedPrivateMethod

Unused Private Method detects when a private method is declared but is unused.

This rule is defined by the following Java class: net.sourceforge.pmd.rules.UnusedPrivateMethodRule

Here's an example of code that would trigger this rule:

			

public class Something {
 private void foo() {} // unused
}

UnusedFormalParameter

Avoid passing parameters to methods and then not using those parameters.

This rule is defined by the following Java class: net.sourceforge.pmd.rules.UnusedFormalParameterRule

Here's an example of code that would trigger this rule:

			

public class Foo {
 private void bar(String howdy) {
  // howdy is not used
 }