Harmonize_1的专栏

与大家分享一下  trim()  split()  indexOf() lastIndexOf()  substring()  的一些基本用法，其余用法可百度！ import java.lang.String; public class Stringtest { private String string; public Stringtest() { string =new

import java.awt.Button; import java.awt.Frame; import java.awt.event.MouseAdapter; import java.awt.event.MouseEvent; import java.awt.event.WindowAdapter; import java.awt.event.WindowEvent; import jav

分享一下我的小练习！ import java.awt.BorderLayout; import javax.swing.*; public class ChatForm extends JFrame{ private JTextArea ta; private JPanel jp; private JComboBox cb; private JTextField jf;