Java: Questions And Answers

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Zeller's Congruence

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import javax.swing.JFrame; import javax.swing.JButton; import java.awt.Color; import java.awt.EventQueue; import java.awt.BorderLayout; import java.beans.PropertyChangeListener; import java.beans.PropertyChangeEvent; import java.awt.event.ActionEvent; import java.awt.event.ActionListener; import java.util.Random; class BoundFrame extends JFrame {     private JButton button1;     private JButton button2;     private Random random;         public BoundFrame() {         initialize();     }         private void initialize() {         button1 = new JButton("Select Me");         button2 = new JButton("No Select Me");         random = new Random();                 button1.addActionListener(new Butt...
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class VarArgs {     public static void main(String[] args) {         System.out.println(sum(1));                System.out.println(sum(1, 2));                System.out.println(sum(1, 2, 3));                System.out.println(sum(1, 2, 3, 4));            }         static int sum(int...args) {         int sum = 0;             for (int i = 0; i < args.length; i++)             sum += args[i];                     return sum;     } }
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