JavaSwing仿QQ登陸界面，註釋完善，適合新手學習

使用說明：

1. 這是一個java作的仿製QQ登陸界面，界面僅使用一個類，
2. JDK版本爲jdk-11 
3. 素材包的名字爲：素材（下載）請在項目中新建一個名字爲「素材」的文件夾。
4. 素材: https://pan.baidu.com/s/1XoXlU4ITi621GLEkuDkSAA 提取碼: 1234 
5. 適合新手學習java Swing使用，若有任何運行問題，請聯繫QQ：1585889713 我儘可能秒回
   
6. 註釋很完善，句句都寫的明明白白的。

package 第十章.view;

import java.awt.Color;
import java.awt.Cursor;
import java.awt.Font;
import java.awt.Point;
import java.awt.Toolkit;
import java.awt.event.FocusEvent;
import java.awt.event.FocusListener;
import java.awt.event.MouseEvent;
import java.awt.event.MouseListener;
import java.awt.event.MouseMotionListener;
import javax.swing.ImageIcon;
import javax.swing.JFrame;
import javax.swing.JLabel;
import javax.swing.JOptionPane;
import javax.swing.JPanel;
import javax.swing.JPasswordField;
import javax.swing.JTextField;
import 第十一章.界面類.Table;//此界面爲java的jdbc作的增刪改和模糊查，數據庫MySQL，須要的聯繫我QQ：1585889713

public class Login extends JFrame implements MouseListener {

JLabel bacgrangd,jan,bi,QQ,qq,tu;//gif,最小化，關閉，logo，QQ，頭像
JLabel an1,an2,lie1,lie2;//暗色塊|線
JTextField user;//帳號
JPasswordField pass;//密碼
JPanel bgcolor;//白
JLabel su1,mi1,ku1,ku2,gou1,gou2;//縮略圖
JLabel text1,text2,text3,text4,text5;//自動登陸，記住密碼，找回密碼，註冊帳號，登陸
static Point origin = new Point();//變量，用於可拖動窗體
int a=0,b=0,c=0,d=0;//控制線
int f=0,g=0,h=0,j=0;//控制√
JLabel submit,ma;//背景


public Login() {

//實例化
bacgrangd = new JLabel(new ImageIcon("素材//1.gif"));
jan = new JLabel(new ImageIcon("素材//最小化.png"));
bi = new JLabel(new ImageIcon("素材//關閉.png"));
QQ = new JLabel(new ImageIcon("素材//qq.png"));
qq = new JLabel("QQ");
an1 = new JLabel();an2 = new JLabel();//暗調
tu = new JLabel(new ImageIcon("素材//頭像.png"));
user = new JTextField();
pass = new JPasswordField();
su1 = new JLabel(new ImageIcon("素材//qq (1).png"));
mi1 = new JLabel(new ImageIcon("素材//密碼.png"));
lie1 = new JLabel(new ImageIcon("素材//直線2.png"));
lie2 = new JLabel(new ImageIcon("素材//直線2.png"));
bgcolor = new JPanel();
ku1 = new JLabel(new ImageIcon("素材//框框.png"));
ku2 = new JLabel(new ImageIcon("素材//框框.png"));
gou1 = new JLabel(new ImageIcon("素材//對勾.png"));
gou2 = new JLabel(new ImageIcon("素材//對勾.png"));
text1 = new JLabel("自動登陸");
text2 = new JLabel("記住密碼");
text3 = new JLabel("找回密碼");
text4 = new JLabel("註冊帳號");
text5 = new JLabel("登陸");
submit = new JLabel();
ma = new JLabel(new ImageIcon("素材//二維碼.png"));

//位置
bacgrangd.setBounds(-35, -123, 500, 250);
jan.setBounds(364, 2, 32, 32);
bi.setBounds(396, 3, 32, 32);
QQ.setBounds(10, 10, 32, 32);
qq.setBounds(50, 5, 45, 45);
an1.setBounds(361, 0, 35, 35);
an2.setBounds(395, 0, 35, 35);
tu.setBounds(170, 80, 90, 85);
user.setBounds(130, 160, 180, 40);
pass.setBounds(130, 200, 180, 40);
su1.setBounds(100, 170, 20, 20);
mi1.setBounds(100, 210, 20, 20);
lie1.setBounds(100, 190, 240, 10);
lie2.setBounds(100, 230, 240, 10);
bgcolor.setBounds(0, 125, 500, 300);
ku1.setBounds(100, 250, 20, 20);
ku2.setBounds(190, 250, 20, 20);
gou1.setBounds(106, 255, 10, 10);
gou2.setBounds(196, 255, 10, 10);
text1.setBounds(125, 250, 80, 20);
text2.setBounds(215, 250, 80, 20);
text3.setBounds(288, 250, 80, 20);
text4.setBounds(15, 300, 80, 20);
text5.setBounds(206, 285, 80, 20);
submit.setBounds(100, 280, 242, 35);
ma.setBounds(385, 290, 30, 30);
//屬性
qq.setFont(new Font("微軟雅黑", 1, 25));
qq.setForeground(Color.white);
an1.setBackground(new Color(0,0,0,0.3f));
an2.setBackground(new Color(0,0,0,0.3f));
bgcolor.setBackground(new Color(255, 255, 255));

user.setForeground(Color.gray);
user.setText("QQ號碼/手機/郵箱");
user.setOpaque(false);//透明背景
user.setBorder(null);//去掉邊框
user.setFont(new Font("微軟雅黑", Font.PLAIN, 16));//框內文字樣式
pass.setFont(new Font("微軟雅黑", Font.PLAIN, 16));//框內文字樣式
pass.setBorder(null);//去掉邊框

pass.setOpaque(false);//透明背景
pass.setForeground(Color.gray);
pass.setText("密碼");
pass.setEchoChar((char)0);//讓密碼顯示出來

text1.setFont(new Font("微軟雅黑", 0, 12));
text2.setFont(new Font("微軟雅黑", 0, 12));
text3.setFont(new Font("微軟雅黑", 0, 12));
text4.setFont(new Font("微軟雅黑", 0, 12));
text5.setFont(new Font("微軟雅黑", 0, 15));
text1.setForeground(new Color(170, 170, 170));
text2.setForeground(new Color(170, 170, 170));
text3.setForeground(new Color(170, 170, 170));
text4.setForeground(new Color(170, 170, 170));
text5.setForeground(Color.white);

gou1.setVisible(false);
gou2.setVisible(false);

submit.setBackground(new Color(5, 186, 251));
submit.setOpaque(true);

text3.setCursor(Cursor.getPredefinedCursor(Cursor.HAND_CURSOR));
text4.setCursor(Cursor.getPredefinedCursor(Cursor.HAND_CURSOR));


//事件區域
jan.addMouseListener(this);
bi.addMouseListener(this);
user.addMouseListener(this);
pass.addMouseListener(this);
text1.addMouseListener(this);
text2.addMouseListener(this);
text3.addMouseListener(this);
text4.addMouseListener(this);
ku1.addMouseListener(this);
ku2.addMouseListener(this);
submit.addMouseListener(this);
ma.addMouseListener(this);
this.addMouseListener(this);


this.addMouseMotionListener(new MouseMotionListener() {//窗體拖動事件
public void mouseMoved(MouseEvent e) {
}
public void mouseDragged(MouseEvent e) {
Point p = getLocation();
setLocation(p.x + e.getX() - origin.x, p.y + e.getY()- origin.y);
}
});

user.addFocusListener(new FocusListener() {

public void focusLost(FocusEvent e) {//失去焦點
su1.setIcon(new javax.swing.ImageIcon("素材//qq (1).png"));
lie1.setIcon(new javax.swing.ImageIcon("素材//直線2.png"));
c=0;
if(user.getText().isEmpty()) {//判斷是否爲空（爲了設置默認提示語）
user.setForeground(Color.gray);
user.setText("QQ號碼/手機/郵箱");
}
}

public void focusGained(FocusEvent e) {//獲得焦點
user.setForeground(Color.black);
lie1.setIcon(new javax.swing.ImageIcon("素材//直線3.png"));
a=1;c=1;b=0;
su1.setIcon(new javax.swing.ImageIcon("素材//qq (2).png"));
if(user.getText().equals("QQ號碼/手機/郵箱")) {
user.setText("");
}else {
user.setText(user.getText());
user.selectAll();
}
}
});

pass.addFocusListener(new FocusListener() {

public void focusLost(FocusEvent e) {//失去焦點
lie2.setIcon(new javax.swing.ImageIcon("素材//直線2.png"));//失去焦點換圖片
mi1.setIcon(new javax.swing.ImageIcon("素材//密碼.png"));
d=0;
if(pass.getText().isEmpty()) {
pass.setForeground(Color.gray);
pass.setText("密碼");
pass.setEchoChar((char)0);//讓密碼顯示出來
}
}

public void focusGained(FocusEvent e) {//獲得焦點
mi1.setIcon(new javax.swing.ImageIcon("素材//密碼 (1).png"));
lie2.setIcon(new javax.swing.ImageIcon("素材//直線3.png"));
b=1;a=0;d=1;
pass.setForeground(Color.black);
pass.setEchoChar('*');//讓用戶輸入看不見
if(pass.getText().equals("密碼")) {
pass.setText("");
}else {
pass.setText(pass.getText());
}
}
});

this.setLayout(null);//佈局

this.add(jan);
this.add(bi);
this.add(qq);
this.add(QQ);
this.add(an1);
this.add(an2);
this.add(tu);
this.add(lie1);
this.add(lie2);
this.add(user);
this.add(pass);
this.add(su1);
this.add(mi1);
this.add(gou1);
this.add(gou2);
this.add(ku1);
this.add(ku2);
this.add(text1);
this.add(text2);
this.add(text3);
this.add(text4);
this.add(text5);
this.add(submit);
this.add(ma);
this.add(bgcolor);
this.add(bacgrangd);

this.setSize(430, 330);
this.setIconImage(Toolkit.getDefaultToolkit().createImage("素材\\透明照片.png"));//窗體圖標
this.setLocationRelativeTo(null);//保持居中
this.setUndecorated(true);//去頂部
this.setFocusable(true);//面板首先得到焦點
this.setBackground(new Color(255,255,255));//背景顏色
this.setDefaultCloseOperation(this.EXIT_ON_CLOSE);
this.setAlwaysOnTop(true);//最頂層
this.setVisible(true);//顯示
}


public static void main(String[] args) {

new Login();

}

public void mouseClicked(MouseEvent e) {//點擊不恢復
}

public void mousePressed(MouseEvent e) {//點擊後
if (e.getSource() == jan) {
setExtendedState(JFrame.ICONIFIED);
}else if(e.getSource()== this) {
origin.x = e.getX();
origin.y = e.getY();
}else if(e.getSource()==bi) {
System.exit(0);
}else if(e.getSource()==ku1||e.getSource()==text1) {
if(f==0) {
gou1.setVisible(true);
g=1;f=1;
}else if(g==1) {
gou1.setVisible(false);
f=0;g=0;
}
}else if(e.getSource()==ku2||e.getSource()==text2) {
if(h==0) {
gou2.setVisible(true);
j=1;h=1;
}else if(j==1) {
gou2.setVisible(false);
h=0;j=0;
}
}else if(e.getSource()==submit||e.getSource()==text5) {
text5.setFont(new Font("微軟雅黑", 0, 14));
dispose();

String users = user.getText();
String password = pass.getText();

if(users.equals("向家康")&&password.equals("666666")) {
//new Table();//打開新的主界面若是要關閉登陸界面能夠寫  dispose（）；
}else {
JOptionPane.showMessageDialog(null, "用戶名：向家康，密碼：666666，您並未設置打開界面！");
new Login();
}

}
}

public void mouseReleased(MouseEvent e) {//點擊時
if(e.getSource()==submit||e.getSource()==text5) {
text5.setFont(new Font("微軟雅黑", 0, 15));
}
}

public void mouseEntered(MouseEvent e) {//懸停
if (e.getSource() == jan) {
an1.setOpaque(true);
}else if(e.getSource()==bi) {
an2.setOpaque(true);
}else if(e.getSource()==user) {
if(a==0&&c==0) {
lie1.setIcon(new javax.swing.ImageIcon("素材//直線4.png"));
}
}else if(e.getSource()==pass) {
if(b==0&&d==0) {
lie2.setIcon(new javax.swing.ImageIcon("素材//直線4.png"));
}
}else if(e.getSource()==text3) {
text3.setForeground(Color.GRAY);
}else if(e.getSource()==text4) {
text4.setForeground(Color.GRAY);
}else if(e.getSource()==ma) {
ma.setIcon(new javax.swing.ImageIcon("素材//二維碼2.png"));
}
}

public void mouseExited(MouseEvent e) {//懸停後
if (e.getSource() == jan) {
an1.setOpaque(false);
}else if(e.getSource()==bi) {
an2.setOpaque(false);
}else if(e.getSource()==user) {
if(a==0) {
lie1.setIcon(new javax.swing.ImageIcon("素材//直線2.png"));
}
}else if(e.getSource()==pass) {
if(b==0) {
lie2.setIcon(new javax.swing.ImageIcon("素材//直線2.png"));
}
}else if(e.getSource()==text3) {
text3.setForeground(new Color(170, 170, 170));
}else if(e.getSource()==text4) {
text4.setForeground(new Color(170, 170, 170));
}else if(e.getSource()==ma) {
ma.setIcon(new javax.swing.ImageIcon("素材//二維碼.png"));
}

}

}

 

 //登陸界面背景是 動態的！歡迎你們來挑刺。。。最好是來學習，哈哈哈。