1:import java.awt.*;
   2:import javax.swing.*;
   3:
   4:public class StringButtons extends JFrame {
   5:    public static void main(String[] args) {
   6:        JFrame f = new JFrame();
   7:        f.getContentPane().setLayout(new GridLayout(1,0));
   8:        for(int i = 0; i < args.length; i++) {
   9:            f.getContentPane().add(new JButton(args[i]));
  10:        }
  11:        f.pack();
  12:        f.setDefaultCloseOperation(JFrame.EXIT_ON_CLOSE);
  13:        f.setVisible(true);
  14:    }
  15:}

   1:public class StringLength {
   2:    public static void main(String[] args) {
   3:        int sum = 0;
   4:        for(int i = 0; i < args.length; i++) {
   5:            sum+=args[i].length();
   6:        }
   7:        System.out.println(sum);
   8:    }
   9:}

   1:public class RemoveDigit {
   2:    public static String removeDigit(String s) {
   3:        char[] array = s.toCharArray();
   4:        String temp = "";
   5:        for(int i = 0; i < array.length; i++) {
   6:            if(!Character.isDigit(array[i])) {
   7:                temp = temp + array[i];
   8:            }
   9:        }
  10:        return temp;
  11:    }
  12:    
  13:    public static void main(String[] args) {
  14:        for(int i = 0; i < args.length; i++) {
  15:            System.out.print(removeDigit(args[i]) + " ");
  16:        }
  17:    }
  18:}

   1:import java.awt.*;
   2:import javax.swing.*;
   3:
   4:public class NumberLabels extends JPanel{
   5:    public static int HORIZONTAL = 0;
   6:    public static int VERTICAL = 1;
   7:    public NumberLabels(int orientation) {
   8:        if(orientation == VERTICAL) {
   9:            setLayout(new GridLayout(0,1));
  10:        } else {
  11:            setLayout(new GridLayout(1,0));
  12:        }
  13:        for(int i = 1; i <= 9; i++) {
  14:            add(new JLabel(Integer.toString(i)));
  15:        }
  16:    }
  17:
  18:}
  19: