java swing 建立一個簡單的QQ介面教程
阿新 • • 發佈：2020-09-14
記錄自己用java swing做的第一個簡易介面。
LoginAction.java
package com.QQUI0819;
import javax.swing.*;
import java.awt.event.*;
//首先，編寫按鈕癿監聽器實現類
public class LoginAction implements
ActionListener {
private int count=0;
//當前為null,建立後指向介面輸入框
private JTextField ulName;
private JTextField ulpass;
//建立時，輸入介面類中癿輸入框
public LoginAction(JTextField ulName,JTextField ulpass ){
this.ulName=ulName;
this.ulpass=ulpass;
}
//實現介面中癿方法
//當勱作發生時，這個方法執行
public void actionPerformed(ActionEvent e) {
//點選時，就取得介面輸入框癿內容
//此時癿jtf，指向是介面上那個輸入框
String u=ulName.getText();
String p=ulName.getText();
System.out.println("賬號輸入的是 "+u);
System.out.println("密碼輸入的是 "+p)
if(u.equals("csy123") ||(p.equals("456"))){
//如果輸入正確，彈出新介面
JFrame jf=new JFrame();
jf.setTitle("登陸成功");
jf.setSize(300,400);
jf.setLocationRelativeTo(null);
jf.setVisible(true);
} else {
//如果輸入正確，彈出新介面
JFrame jf=new JFrame();
jf.setTitle("登陸失敗");
jf.setSize(300,100);
JButton b1 = new JButton("登陸失敗，賬號和密碼不匹配");
jf.add(b1);
jf.setLocationRelativeTo(null);
jf.setVisible(true);
}
}
}
QQ.java
package com.QQUI0819;
import java.awt.Color;
import java.awt.Container;
import java.awt.Cursor;
import java.awt.Font;
import java.awt.Image;
import java.util.ArrayList;
import javax.swing.ImageIcon;
import javax.swing.JButton;
import javax.swing.JCheckBox;
import javax.swing.JFrame;
import javax.swing.JLabel;
import javax.swing.JPasswordField;
import javax.swing.JRootPane;
import javax.swing.JTextField;
public class QQ extends JFrame{
//使用者名稱
private JTextField ulName;
//密碼
private JPasswordField ulPasswd;
//小容器
private JLabel j1;
private JLabel j2;
private JLabel j3;
private JLabel j4;
//小按鈕
private JButton b1;
//複選框
private JCheckBox c1;
private JCheckBox c2;
/**
* 初始化QQ登入頁面
* */
public QQ(){
//設定登入視窗標題
this.setTitle("QQ登入");
//去掉視窗的裝飾(邊框)
//採用指定的視窗裝飾風格
this.getRootPane().setWindowDecorationStyle(JRootPane.NONE);
//窗體元件初始化
init();
this.setDefaultCloseOperation(JFrame.EXIT_ON_CLOSE);
//設定佈局為絕對定位
this.setLayout(null);
this.setBounds(0,355,265);
//設定窗體的圖示
Image img0 = new ImageIcon("E:\\藍傑培訓\\第一週java基礎\\basicStudy\\src\\com\\QQUI0819\\QQlogo.jpg").getImage();
this.setIconImage(img0);
//窗體大小不能改變
this.setResizable(false);
//居中顯示
this.setLocationRelativeTo(null);
//窗體顯示
this.setVisible(true);
}
/**
* 窗體元件初始化
* */
public void init(){
//建立一個容器,其中的圖片大小和setBounds
Container container = this.getContentPane();
j1 = new JLabel();
//設定背景色
Image img1 = new ImageIcon("E:\\藍傑培訓\\第一週java基礎\\basicStudy\\src\\com\\QQUI0819\\QQ.jpg").getImage();
j1.setIcon(new ImageIcon(img1));
j1.setBounds(0,90);
//qq頭像設定
j2 = new JLabel();
Image img2 = new ImageIcon("E:\\藍傑培訓\\第一週java基礎\\basicStudy\\src\\com\\QQUI0819\\QQlogo.jpg").getImage();
j2.setIcon(new ImageIcon(img2));
j2.setBounds(20,100,60,63);
//使用者名稱輸入框
ulName = new JTextField();
ulName.setBounds(100,150,20);
//註冊賬號
j3 = new JLabel("註冊賬號");
j3.setBounds(260,70,20);
//密碼輸入框
ulPasswd = new JPasswordField();
ulPasswd.setBounds(100,130,20);
//找回密碼
j4= new JLabel("找回密碼");
j4.setBounds(260,20);
//記住密碼
c1 = new JCheckBox("記住密碼");
c1.setBounds(105,155,80,15);
//自動登陸
c2 = new JCheckBox("自動登陸");
c2.setBounds(185,15);
//登陸按鈕
b1 = new JButton("登入");
//設定字型和顏色和手形指標
b1.setFont(new Font("宋體",Font.PLAIN,12));
b1.setForeground(Color.black);
b1.setCursor(Cursor.getPredefinedCursor(Cursor.HAND_CURSOR));
b1.setBounds(20,200,300,20);
//給按鈕新增
//所有元件用容器裝載
this.add(j1);
this.add(j2);
this.add(j3);
this.add(j4);
this.add(c1);
this.add(c2);
this.add(b1);
//建立監聽器物件，幵加給按鈕
LoginAction lo=new LoginAction(ulName,ulPasswd);
b1.addActionListener(lo);
container.add(j1);
container.add(ulName);
container.add(ulPasswd);
}
public static void main(String[] args) {
new QQ();
}
}
效果圖
素材
logo:
QQ logo:
補充知識：建立一個簡單的Java Swing登入視窗
連線資料圖就不弄了，要連線資料庫的自行新增
為了方便排版，Layout用SpringLayout型別
1.賬號框採用JTextField 型別
2.密碼框採用JPasswordField型別
兩者的區別是：
JPasswordField顯示的文字是這樣的：
文字框JTextField顯示的文字是這樣的：
3.建立兩個JButton，一個是“登入”按鈕，另一個是“重置”按鈕
4.建立兩個Checkbox：一個是記住密碼，另一個是隱身登入
5.最後一步加入背景圖
程式碼：
package l;
import java.awt.BorderLayout;
import java.awt.Color;
import java.awt.Container;
import java.awt.EventQueue;
import javax.swing.JFrame;
import javax.swing.JPanel;
import javax.swing.border.EmptyBorder;
import javax.swing.SpringLayout;
import javax.swing.JLabel;
import java.awt.Font;
import javax.swing.JTextField;
import javax.swing.JPasswordField;
import javax.swing.ImageIcon;
import javax.swing.JButton;
import java.awt.event.FocusAdapter;
import java.awt.event.FocusEvent;
import javax.swing.JLayeredPane;
import java.awt.Checkbox;
public class Login extends JFrame {
private JPanel contentPane;
private JTextField textField;
private JPasswordField passwordField;
public static void main(String[] args) {
EventQueue.invokeLater(new Runnable() {
public void run() {
try {
Login frame = new Login();
frame.setVisible(true); //視窗可見
frame.setResizable(false); //設定登入視窗不能調整大小
ImageIcon img = new ImageIcon("d:/img.jpg");//這是背景圖片
JLabel imgLabel = new JLabel(img);//將背景圖放在標籤裡。
frame.getLayeredPane().add(imgLabel,new Integer(Integer.MIN_VALUE));
imgLabel.setBounds(0,img.getIconWidth(),img.getIconHeight());
Container cp=frame.getContentPane();
((JPanel)cp).setOpaque(false);
} catch (Exception e) {
e.printStackTrace();
}
}
});
}
public Login() {
setDefaultCloseOperation(JFrame.EXIT_ON_CLOSE);
setBounds(100,450,300);
contentPane = new JPanel();
contentPane.setBorder(new EmptyBorder(5,5,5));
setContentPane(contentPane);
SpringLayout sl_contentPane = new SpringLayout();
contentPane.setLayout(sl_contentPane);
JLabel lblNewLabel = new JLabel("賬號：");
lblNewLabel.setFont(new Font("黑體",19));
sl_contentPane.putConstraint(SpringLayout.NORTH,lblNewLabel,34,SpringLayout.NORTH,contentPane);
sl_contentPane.putConstraint(SpringLayout.WEST,41,SpringLayout.WEST,contentPane);
contentPane.add(lblNewLabel);
JLabel lblNewLabel_1 = new JLabel("密碼：");
lblNewLabel_1.setFont(new Font("黑體",lblNewLabel_1,29,SpringLayout.SOUTH,lblNewLabel);
sl_contentPane.putConstraint(SpringLayout.WEST,lblNewLabel);
contentPane.add(lblNewLabel_1);
textField = new JTextField();
textField.addFocusListener(new FocusAdapter() {
@Override
public void focusLost(FocusEvent e) {
String temp=textField.getText();
if(temp.equals("")) {
textField.setForeground(Color.GRAY); //JTextField提示輸入QQ號
textField.setText("請輸入QQ號");
}
}
public void focusGained(FocusEvent e) {
String temp=textField.getText();
if(temp.equals("請輸入QQ號")) {
textField.setText("");
}
}
});
sl_contentPane.putConstraint(SpringLayout.NORTH,textField,1,52,SpringLayout.EAST,lblNewLabel);
sl_contentPane.putConstraint(SpringLayout.EAST,196,lblNewLabel);
contentPane.add(textField);
textField.setColumns(10);
passwordField = new JPasswordField();
sl_contentPane.putConstraint(SpringLayout.NORTH,passwordField,26,textField);
sl_contentPane.putConstraint(SpringLayout.WEST,lblNewLabel_1);
sl_contentPane.putConstraint(SpringLayout.SOUTH,48,textField);
sl_contentPane.putConstraint(SpringLayout.EAST,201,lblNewLabel_1);
contentPane.add(passwordField);
JButton btnNewButton = new JButton("登入");
sl_contentPane.putConstraint(SpringLayout.SOUTH,btnNewButton,65,passwordField);
contentPane.add(btnNewButton);
JButton button = new JButton("重置");
sl_contentPane.putConstraint(SpringLayout.NORTH,2,button);
sl_contentPane.putConstraint(SpringLayout.EAST,-70,button);
sl_contentPane.putConstraint(SpringLayout.NORTH,button,32,passwordField);
sl_contentPane.putConstraint(SpringLayout.WEST,242,contentPane);
button.setFont(new Font("宋體",19));
contentPane.add(button);
Checkbox checkbox = new Checkbox("記住密碼");
sl_contentPane.putConstraint(SpringLayout.WEST,checkbox,textField);
sl_contentPane.putConstraint(SpringLayout.SOUTH,-6,btnNewButton);
contentPane.add(checkbox);
Checkbox checkbox_1 = new Checkbox("隱身登入");
sl_contentPane.putConstraint(SpringLayout.WEST,checkbox_1,35,checkbox);
sl_contentPane.putConstraint(SpringLayout.SOUTH,checkbox);
contentPane.add(checkbox_1);
}
}
執行截圖：
以上這篇java swing 建立一個簡單的QQ介面教程就是小編分享給大家的全部內容了，希望能給大家一個參考，也希望大家多多支援我們。