说明：  整数多种进制形式相互转换，指定一种整数类型，以一种进制形式输入一个整数，将其及负数分别转换成其他进制形式显示
(import java.awt.* import java.awt.event.* import javax.swing.* import javax.swing.event.CaretListener import javax.swing.event.CaretEvent public class NumJFrame extends JFrame implements ActionListener { private JTextField text_ten,text_str1,text_two,text_str2,text_four,text_str3,text_eight,text_str4,text_sixth,text_str5 private MessageJDialog jdialog private JButton button_ten,button_two,button_four,button_eight,button_sixth public NumJFrame() { super("int整数多种进制相互转换") this.setBounds(300,240,400,200) this.setResizable(false) this.setBackground(java.awt.Color.lightGray) this.setDefaultCloseOperation(EXIT_ON_CLOSE) this.getContentPane().setLayout(new GridLayout(4,3)) button_ten=new JButton("十进制") button_ten.addActionListener(this) text_ten.setHorizontalAlignment(JTextField.LEFT) this.getContentPane().add(text_ten) text_str1=new JTextField(50) text_str1.setHorizontalAlignment(JTextField.LEFT) text_str1.s)