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design UseCollectionIsEmpty (PMD)

Substitute calls to size() == 0 (or size() != 0) with calls to isEmpty()

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.

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

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

Additional info can be found at this http://pmd.sourceforge.net/rules/design.html#UseCollectionIsEmpty site.