Компьютерный юмор :)

public class Test3
{
    
    private int countSucceeded;
    private int countFailed;
    
    public static void main( String[ ] args )
    {
        Test3 test = new Test3( );
        test.RunTests( );
    }
    
    public Test3( )
    {
        countSucceeded = 0;
        countFailed = 0;
    }

    private void stat( boolean b )
    {
        if ( b )
        {
            ++countSucceeded;
        }
        else
        {
            ++countFailed;
        }
    }
    
    public void RunTests( )
    {
        System.out.println( "========" );

        String s1 = new String( "abc" );
        String s2 = new String( "xyz" );
        String s3 = new String( "abc" );
        String s4 = new String( "ABC" );

        stat( testRef( s1, s2, false ) );
        stat( testRef( s1, s3, false ) );
        stat( testRef( s1, s1, true ) );
        stat( testRef( s3, s4, false ) );
        
        stat( testVal( s1, s2, false ) );
        stat( testVal( s1, s3, true ) );
        stat( testVal( s1, s1, true ) );
        stat( testVal( s1, s4, false ) );
        
        stat( testValIgn( s1, s2, false ) );
        stat( testValIgn( s1, s3, true ) );
        stat( testValIgn( s1, s1, true ) );
        stat( testValIgn( s1, s4, true ) );
        
        System.out.println( 
                            "-------- Successful test " + countSucceeded +
                            ", Failed tests " + countFailed +
                            ", Total tests " + ( countSucceeded + countFailed )
                          );
        
    }
    
    private boolean testRef( String o1, String o2, boolean expected )
    {
        boolean cmp = o1 == o2;
        boolean res = cmp == expected;
        if ( res )
        {
            System.out.println( "testRef passed" );
            
        }
        else
        {
            System.out.println( "testRef failed" );
        }
        
        return res;
    }
    
    private boolean testVal( String o1, String o2, boolean expected )
    {
        boolean cmp = o1.equals( o2 );
        boolean res = cmp == expected;
        if ( res )
        {
            System.out.println( "testVal passed" );
            
        }
        else
        {
            System.out.println( "testVal failed" );
        }
        
        return res;
    }
    
    private boolean testValIgn( String o1, String o2, boolean expected )
    {
        boolean cmp = o1.equalsIgnoreCase( o2 );
        boolean res = cmp == expected;
        if ( res )
        {
            System.out.println( "testValIgn passed" );
            
        }
        else
        {
            System.out.println( "testValIgn failed" );
        }
        
        return res;
    }
    
}