import java.awt.BorderLayout;import java.awt.FlowLayout;import java.awt.event.ActionEvent;import java.awt.event.ActionListener;import javax.swing.JButton;import javax.swing.JCheckBox;import javax.swing.JFileChooser;import javax.swing.JFrame;import javax.swing.JLabel;import javax.swing.JPanel;import javax.swing.JTextField;public class where extends JFrame implements ActionListener { JLabel l1,l2; JFileChooser f; JTextField t; JButton b1,b2; JCheckBox c; JPanel p1,p2; where(){ l1=new JLabel("選擇加密文件"); l2=new JLabel("選擇加密/解密算子"); t=new JTextField(10); b1=new JButton("確定"); b1=new JButton("取消"); c=new JCheckBox("覆蓋文件"); f=new JFileChooser(); p1=new JPanel(); p2=new JPanel(); setLayout(new BorderLayout()); add(p1,BorderLayout.CENTER); add(p2,BorderLayout.SOUTH); f.setControlButtonsAreShown(false); p1.add(p1); p1.add(p2); p2.setLayout(new FlowLayout(FlowLayout.LEFT));p2.add(l1); p2.add(l2); p2.add(f); p2.add(t); p2.add(c); this.setSize(300,400); this.setDefaultCloseOperation(JFrame.EXIT_ON_CLOSE); this.setResizable(false); this.setVisible(true); setEvent(); }private void setEvent() { // TODO Auto-generated method stub }public static void main(String[] args) { new where();}@Overridepublic void actionPerformed(ActionEvent arg0) { // TODO Auto-generated method stub }}