// Fig. 5.19: LogicalOperators.java
// Logical operators.
import javax.swing.*;

public class LogicalOperators {

   public static void main( String args[] )
   {
      // create JTextArea to display results
      JTextArea outputArea = new JTextArea( 17, 20 );

      // attach JTextArea to a JScrollPane so user can scroll results
      JScrollPane scroller = new JScrollPane( outputArea );

      // create truth table for && (conditional AND) operator
      String output = "Conditional AND (&&)" +  
         "\nfalse && false: " + ( false && false ) +
         "\nfalse && true: " + ( false && true ) +
         "\ntrue && false: " + ( true && false ) +
         "\ntrue && true: " + ( true && true );

      // create truth table for || (conditional OR) operator
      output += "\n\nConditional OR (||)" +
         "\nfalse || false: " + ( false || false ) +
         "\nfalse || true: " + ( false || true ) +
         "\ntrue || false: " + ( true || false ) +
         "\ntrue || true: " + ( true || true );

      // create truth table for & (boolean logical AND) operator
      output += "\n\nBoolean logical AND (&)" +
         "\nfalse & false: " + ( false & false ) +
         "\nfalse & true: " + ( false & true ) +
         "\ntrue & false: " + ( true & false ) +
         "\ntrue & true: " + ( true & true );

      // create truth table for | (boolean logical inclusive OR) operator
      output += "\n\nBoolean logical inclusive OR (|)" +
         "\nfalse | false: " + ( false | false ) +
         "\nfalse | true: " + ( false | true ) +
         "\ntrue | false: " + ( true | false ) +
         "\ntrue | true: " + ( true | true );

      // create truth table for ^ (boolean logical exclusive OR) operator
      output += "\n\nBoolean logical exclusive OR (^)" +
         "\nfalse ^ false: " + ( false ^ false ) +
         "\nfalse ^ true: " + ( false ^ true ) +
         "\ntrue ^ false: " + ( true ^ false ) +
         "\ntrue ^ true: " + ( true ^ true );

      // create truth table for ! (logical negation) operator
      output += "\n\nLogical NOT (!)" +
         "\n!false: " + ( !false ) + 
         "\n!true: " + ( !true );

      outputArea.setText( output );  // place results in JTextArea

      JOptionPane.showMessageDialog( null, scroller,
         "Truth Tables", JOptionPane.INFORMATION_MESSAGE );

      System.exit( 0 );  // terminate application

   } // end main

} // end class LogicalOperators


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