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resources.report.rules.pmd.UseCollectionIsEmpty.html Maven / Gradle / Ivy

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
				}
	    	}
	}