import java.util.*;import java.awt.*;import java.awt.event.*;import javax.swing.*; public class test extends JFrame{ private JLabel promptLabel; private JTextField inputField; private JTextArea outputArea;      public test(){   super("ceshi StringTokenizer");   Container container=getContentPane();   container.setLayout(new FlowLayout());   promptLabel=new JLabel("shu ru yi ge shu");   container.add(promptLabel);   inputField=new JTextField(20);            inputField.addActionListener(new ActionListener(){    public void actionPerformed(ActionEvent event){     StringTokenizer tokens=new StringTokenizer(event.getActionCommand());          outputArea.setText("Number of elements"+tokens.countTokens()+"\nThe tokens are:\n");          while(tokens.hasMoreTokens())     outputArea.append(tokens.nextToken()+"\n");    }   });      container.add(inputField);   outputArea=new JTextArea(10,20);   outputArea.setEditable(false);   container.add(new JScrollPane(outputArea));      setSize(275,240);   setVisible(true);     }    public static void main(String args[]){   test application=new test();   application.setDefaultCloseOperation(JFrame.EXIT_ON_CLOSE);  }}

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