UseCollectionIsEmpty

The isEmpty() method on java.util.Collection is provided to see if a collection has any elements. Comparing the value of size() to 0 merely duplicates existing behavior.

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

Example:

                
    
	public class Foo {
		void good() {
        	List foo = getList();
			if (foo.isEmpty()) {
				// blah
			}
    	}

	    void bad() {
    	    List foo = getList();
				if (foo.size() == 0) {
					// blah
				}
	    	}
	}