package swing;

public class mains {

public static void main(String[] args) {

new swing();

}

}

package swing;

import java.awt.Color;

import java.awt.event.ActionEvent;

import java.awt.event.ActionListener;

import java.awt.event.FocusEvent;

import java.awt.event.FocusListener;

import javax.swing.ImageIcon;/*插圖片時可上這個*/

import javax.swing.ButtonGroup;

import javax.swing.JButton;

import javax.swing.JCheckBox;

import javax.swing.JComboBox;

import javax.swing.JFrame;

import javax.swing.JLabel;

import javax.swing.JOptionPane;

import javax.swing.JPasswordField;

import javax.swing.JRadioButton;

import javax.swing.JTextArea;

import javax.swing.JTextField;

class shijian implements ActionListener, FocusListener {

static swing d = null;

/* 下面的是構(gòu)造方法，無void */

public shijian(swing dl) {

d = dl;

}

@Override

/*

*?

* actionperformed方法是ActionListener監(jiān)聽事件中的一個重寫方法，

*?

* 如果要求按鈕執(zhí)行一些動作，可以在這個方法中添加、修改、刪除以及判斷。

*/

public void actionPerformed(ActionEvent arg0) {

/* 當(dāng)按鈕中字符為"登錄"時，就執(zhí)行equals("登錄")中的內(nèi)容 */

if (arg0.getActionCommand().equals("已經(jīng)注冊過，可直接登錄")) {

/* trim()函數(shù)移除字符串兩側(cè)的空白字符或其他預(yù)定義字符。 */

String uname = swing.uname.getText().trim();

String pwd = swing.pwd.getText().trim();

if (uname.isEmpty() || pwd.isEmpty()) {

JOptionPane.showMessageDialog(null, "用戶名或密碼為空");

} else {

if (uname.equals(yonghu.uname) && pwd.equals(yonghu.pwd)) {

JOptionPane.showMessageDialog(null, "用戶名和密碼輸入正確，可以登錄");

new chenggongjiemian();

d.setVisible(false);

} else {

JOptionPane.showMessageDialog(null, "用戶名或密碼輸入錯誤");

}

}

}

else if (arg0.getActionCommand().equals("沒注冊過，先注冊")) {

JOptionPane.showMessageDialog(null, "沒注冊過，先注冊");

} else {

int o = JOptionPane.showConfirmDialog(null, "是否確認(rèn)關(guān)閉頁面");

if (o == 0) {

System.exit(0);

}

}

}

/*

*?

* arg是java主函數(shù)的入口參數(shù)，它是一個字符串?dāng)?shù)組變量 void focusGained(FocusEvent e):當(dāng)獲得焦點時發(fā)生.

*?

* void focusLost(FocusEvent e):當(dāng)失去焦點時發(fā)生.

*/

@Override

public void focusGained(FocusEvent arg0) {

if (arg0.getSource() == d.uname) {

System.out.println("選中了用戶名框");

} else if (arg0.getSource() == d.pwd) {

System.out.println("選中了密碼框");

} else if (arg0.getSource() == d.pwd1) {

System.out.println("選中了確認(rèn)密碼框");

}

}

@Override

public void focusLost(FocusEvent arg0) {

if (arg0.getSource() == d.uname) {

/* getSource獲得所選 */

String uname = d.uname.getText();

if (uname.isEmpty()) {

d.lb_uname_panduan.setText("請輸入用戶名");

d.lb_uname_panduan.setForeground(Color.red);

} else {

if (uname.length() > 12 || uname.length() == 0) {

d.lb_uname_panduan.setText("用戶名格式輸入錯誤");

d.lb_uname_panduan.setForeground(Color.red);

} else {

d.lb_uname_panduan.setText("用戶名輸入正確");

d.lb_uname_panduan.setForeground(Color.green);

}

}

} else if (arg0.getSource() == d.pwd) {

String pwd = d.pwd.getText().trim();

if (pwd.length() < 6 || pwd.length() == 0) {

d.lb_pwd_panduan.setText("密碼格式輸入錯誤,不可少于6位");

d.lb_pwd_panduan.setForeground(Color.red);

} else {

d.lb_pwd_panduan.setText("輸入正確");

d.lb_pwd_panduan.setForeground(Color.green);

}

} else if (arg0.getSource() == d.pwd1) {/*

* 做判斷兩次密碼是否一致的判斷

*?

* 先獲取第一次輸入的密碼，再獲取第二次輸入的密碼，

* 然后比較一下兩次密碼是否一致不就完啦

*/

String pwd1 = d.pwd.getText().trim();// 獲取第一次的密碼

String pwd2 = d.pwd1.getText().trim();// 獲取第二次輸入的密碼.

if (pwd1.equals(pwd2)) {

d.lb_pwd_queren.setText("輸入正確");

d.lb_pwd_queren.setForeground(Color.GREEN);

} else {

d.lb_pwd_queren.setText("兩次密碼輸入不一致");

d.lb_pwd_queren.setForeground(Color.red);

}

}

}

}

public class swing extends JFrame {

static JCheckBox aihao1, aihao2, aihao3 = null;

static JComboBox com1 = null;

static JButton DengLuAnNu, QuXiaoAnNu, ZhuCeMiMaAnNu = null;

static JTextArea jt1 = null;

static JLabel lb_uname, lb_qrmima, lb_sex, lb_aihao, lb_address,

lb_jieshao = null;

static JLabel lb_uname_panduan, lb_pwd_panduan, lb_pwd,

lb_pwd_queren = null;

static JPasswordField pwd, pwd1 = null;

static JRadioButton sex_man, sex_woman = null;

static JTextField uname;

shijian sj = new shijian(this);

/* this就是指對象自己,表示自己，在那個對象的成員函數(shù)里出現(xiàn)就表示哪個對象 */

public swing() {

/* 總界面設(shè)置 */

this.setTitle("登錄界面");

this.setSize(700, 600);

this.setLocationRelativeTo(null);

this.setLayout(null);

/* 用戶名 */

lb_uname = new JLabel("用戶名");

this.add(lb_uname);

lb_uname.setBounds(100, 100, 40, 30);

/* setBounds(x,y,size_x,size_y) */

uname = new JTextField(20);

uname.setBounds(180, 100, 140, 30);

uname.addFocusListener(sj);

this.add(uname);

lb_uname_panduan = new JLabel("用戶名長度不能大于12位");

lb_uname_panduan.setForeground(Color.red);

lb_uname_panduan.setBounds(330, 100, 250, 30);

this.add(lb_uname_panduan);

/* 密 碼 */

lb_pwd = new JLabel("密 碼");

this.add(lb_pwd);

lb_pwd.setBounds(100, 140, 40, 30);

pwd = new JPasswordField();

pwd.setBounds(180, 140, 140, 30);

pwd.addFocusListener(sj);

this.add(pwd);

lb_pwd_panduan = new JLabel("請輸入密 碼,不可少與6位");

lb_pwd_panduan.setForeground(Color.red);

lb_pwd_panduan.setBounds(330, 140, 240, 30);

this.add(lb_pwd_panduan);

// lb_pwd_panduan = new JLabel("請確認(rèn)密碼");

// lb_pwd_panduan.setForeground(Color.red);

// lb_pwd_panduan.setBounds(330, 140, 150, 30);

// this.add(lb_pwd_panduan);

/* 確認(rèn)密碼 */

lb_qrmima = new JLabel("確認(rèn)密碼");

lb_qrmima.setBounds(100, 180, 70, 30);

this.add(lb_qrmima);

pwd1 = new JPasswordField(20);

pwd1.setBounds(180, 180, 140, 30);

// pwd1.addFocusListener(sj);

pwd1.addFocusListener(new shijian(this));

this.add(pwd1);

lb_pwd_queren = new JLabel("請輸入和上一 次一致的密碼");

lb_pwd_queren.setForeground(Color.red);

lb_pwd_queren.setBounds(330, 180, 180, 30);

this.add(lb_pwd_queren);

lb_pwd_queren.addFocusListener(sj);

lb_sex = new JLabel("性別");

lb_sex.setBounds(100, 210, 70, 30);

this.add(lb_sex);

sex_woman = new JRadioButton("女");

sex_man = new JRadioButton("男", true);

sex_man.setBounds(180, 210, 70, 30);

sex_woman.setBounds(260, 210, 70, 30);

this.add(sex_man);

this.add(sex_woman);

ButtonGroup bg1 = new ButtonGroup();

bg1.add(sex_man);

bg1.add(sex_woman);

lb_aihao = new JLabel("愛好");

lb_aihao.setBounds(100, 250, 70, 30);

this.add(lb_aihao);

aihao1 = new JCheckBox("唱");

aihao2 = new JCheckBox("跳");

aihao3 = new JCheckBox("rap");

aihao1.setBounds(180, 250, 70, 30);

aihao2.setBounds(250, 250, 70, 30);

aihao3.setBounds(320, 250, 70, 30);

this.add(aihao1);

this.add(aihao2);

this.add(aihao3);

lb_address = new JLabel("家庭地址");

lb_address.setBounds(100, 290, 70, 30);

this.add(lb_address);

com1 = new JComboBox();

com1.addItem("請選擇家庭地址");

com1.addItem("北京");

com1.addItem("上海");

com1.addItem("廣州");

com1.setBounds(180, 290, 140, 30);

this.add(com1);

lb_jieshao = new JLabel("個人介紹");

lb_jieshao.setBounds(100, 330, 70, 30);

this.add(lb_jieshao);

jt1 = new JTextArea();

jt1.setColumns(8);

jt1.setRows(4);

jt1.setBounds(180, 330, 140, 40);

jt1.setLineWrap(true);

this.add(jt1);

JButton btn_dl = new JButton("已經(jīng)注冊過，可直接登錄");

btn_dl.setBounds(20, 400, 180, 35);

QuXiaoAnNu = new JButton("取消");

ZhuCeMiMaAnNu = new JButton("沒注冊過，先注冊");

ZhuCeMiMaAnNu.setBounds(368, 400, 180, 35);

QuXiaoAnNu.setBounds(240, 400, 80, 35);

btn_dl.addActionListener(sj);

ZhuCeMiMaAnNu.addActionListener(sj);

QuXiaoAnNu.addActionListener(sj);

this.add(btn_dl);

this.add(ZhuCeMiMaAnNu);

this.add(QuXiaoAnNu);

this.setDefaultCloseOperation(JFrame.EXIT_ON_CLOSE);

this.setVisible(true);

}

}

class yonghu {

static String pwd = "pwdpwd";

static String uname = "1";

}

package swing;

import java.awt.Color;

import java.awt.event.ActionEvent;

import java.awt.event.ActionListener;

import javax.swing.BorderFactory;

import javax.swing.ImageIcon;

import javax.swing.JButton;

import javax.swing.JFrame;

import javax.swing.JLabel;

import javax.swing.JPanel;

public class chenggongjiemian extends JFrame {

static JButton btn1, btn2, btn3, btn4 = null;

static JPanel jp1, jp2, jp3, jp4, jp5, jp6 = null;

static JLabel lb3, lb4, lb5, lb6 = null;

public chenggongjiemian() {

this.setTitle("登錄后的主界面");

this.setLayout(null);

this.setSize(700, 700);

this.setLocationRelativeTo(null);

// 實例化Jpanel

jp1 = new JPanel(null);

btn1 = new JButton("切換用戶");

btn1.setBounds(100, 20, 100, 60);

btn2 = new JButton("借閱排行榜");

btn2.setBounds(250, 20, 100, 60);

btn3 = new JButton("系統(tǒng)管理");

btn3.setBounds(400, 20, 100, 60);

btn4 = new JButton("退出系統(tǒng)");

btn4.setBounds(550, 20, 100, 60);

jp1.add(btn1);

jp1.add(btn2);

jp1.add(btn3);

jp1.add(btn4);

jp2 = new JPanel(null);

jp3 = new JPanel(null);

jp4 = new JPanel(null);

jp5 = new JPanel(null);

jp6 = new JPanel(null);

lb3 = new JLabel("切換用戶頁面");

lb4 = new JLabel("借閱排行榜頁面");

lb5 = new JLabel("系統(tǒng)管理頁面");

lb6 = new JLabel("退出系統(tǒng)頁面");

lb3.setBounds(200, 200, 200, 50);

lb4.setBounds(200, 200, 200, 50);

lb5.setBounds(200, 200, 200, 50);

lb6.setBounds(200, 200, 200, 50);

//lb3.setIcon(new ImageIcon("img//14.png"));

jp3.add(lb3);

jp4.add(lb4);

jp5.add(lb5);

jp6.add(lb6);

btn1.addActionListener(new shijian_mian(this));

btn2.addActionListener(new shijian_mian(this));

btn3.addActionListener(new shijian_mian(this));

btn4.addActionListener(new shijian_mian(this));

// 給投塊區(qū)域設(shè)置他們的大小和位置,也是使用setBound進行設(shè)置

jp1.setBounds(0, 0, 700, 100);

jp2.setBounds(0, 100, 150, 600);

jp3.setBounds(150, 100, 550, 600);

jp4.setBounds(150, 100, 550, 600);

jp5.setBounds(150, 100, 550, 600);

jp6.setBounds(150, 100, 550, 600);

jp1.setBorder(BorderFactory.createLineBorder(Color.red));

jp2.setBorder(BorderFactory.createLineBorder(Color.green));

jp3.setBorder(BorderFactory.createLineBorder(Color.blue));

jp4.setBorder(BorderFactory.createLineBorder(Color.red));

jp5.setBorder(BorderFactory.createLineBorder(Color.green));

jp6.setBorder(BorderFactory.createLineBorder(Color.blue));

// 將這三個區(qū)域添加到當(dāng)前窗體中

this.add(jp1);

this.add(jp2);

this.add(jp3);

this.add(jp4);

this.add(jp5);

this.add(jp6);

this.setDefaultCloseOperation(JFrame.EXIT_ON_CLOSE);

this.setVisible(true);

// this.setTitle("登錄后的界面");

// this.setLayout(null);

// this.setSize(800, 800);

// this.setLocationRelativeTo(null);

// this.setDefaultCloseOperation(JFrame.EXIT_ON_CLOSE);

// this.setVisible(true);

}

}

class shijian_mian implements ActionListener {

public chenggongjiemian dd = null;

public shijian_mian(chenggongjiemian d) {

dd = d;

}

@Override

public void actionPerformed(ActionEvent arg0) {

if (arg0.getSource() == dd.btn1) {

// 點擊的是第-一個按鈕執(zhí)行第一個按鈕的內(nèi)容

dd.jp3.setVisible(true);// 讓jp3的區(qū)域顯示，其他的區(qū)域隱藏

dd.jp4.setVisible(false);

dd.jp5.setVisible(false);

dd.jp6.setVisible(false);

} else if (arg0.getSource() == dd.btn2) {

// 點擊的是第2個按鈕執(zhí)行第2個按鈕的內(nèi)容

dd.jp4.setVisible(true);// 讓jp4的區(qū)域顯示，其他的區(qū)域隱藏

dd.jp3.setVisible(false);

dd.jp5.setVisible(false);

dd.jp6.setVisible(false);

} else if (arg0.getSource() == dd.btn3) {

// 點擊的是第3個按鈕執(zhí)行第3個按鈕的內(nèi)容

dd.jp5.setVisible(true);// 讓jp5的區(qū)域顯示，其他的區(qū)域隱藏

dd.jp4.setVisible(false);

dd.jp3.setVisible(false);

dd.jp6.setVisible(false);

} else if (arg0.getSource() == dd.btn4) {

// 點擊的是第4個按鈕執(zhí)行第4個按鈕的內(nèi)容

dd.jp6.setVisible(true);// 讓jp6的區(qū)域顯示，其他的區(qū)域隱藏

dd.jp4.setVisible(false);

dd.jp5.setVisible(false);

dd.jp3.setVisible(false);

}

}

}

執(zhí)行效果展示：

界面不夠美觀？那么加下圖片（png或gif），只要下面的部分改變其他的和上面的可以一樣：

package swing;

import java.awt.Color;

import java.awt.event.ActionEvent;

import java.awt.event.ActionListener;

import javax.swing.BorderFactory;

import javax.swing.ImageIcon;

import javax.swing.JButton;

import javax.swing.JFrame;

import javax.swing.JLabel;

import javax.swing.JPanel;

public class chenggongjiemian extends JFrame {

static JButton btn1, btn2, btn3, btn4 = null;

static JPanel jp1, jp2, jp3, jp4, jp5, jp6 = null;

static JLabel lb3, lb4, lb5, lb6 = null;

public chenggongjiemian() {

this.setTitle("登錄后的主界面");

this.setLayout(null);

this.setSize(700, 700);

this.setLocationRelativeTo(null);

// 實例化Jpanel

jp1 = new JPanel(null);

btn1 = new JButton("切換用戶");

btn1.setBounds(100, 20, 100, 60);

btn2 = new JButton("借閱排行榜");

btn2.setBounds(250, 20, 100, 60);

btn3 = new JButton("系統(tǒng)管理");

btn3.setBounds(400, 20, 100, 60);

btn4 = new JButton("退出系統(tǒng)");

btn4.setBounds(550, 20, 100, 60);

jp1.add(btn1);

jp1.add(btn2);

jp1.add(btn3);

jp1.add(btn4);

jp2 = new JPanel(null);

jp3 = new JPanel(null);

jp4 = new JPanel(null);

jp5 = new JPanel(null);

jp6 = new JPanel(null);

lb3 = new JLabel();

lb4 = new JLabel();

lb5 = new JLabel();

lb6 = new JLabel();

lb3.setBounds(0, 0, 534, 564);// QQ截圖界面可知道要的圖片大小

/* setBounds(x,y,size_x,size_y) */

lb4.setBounds(0, 0, 534, 564);

lb5.setBounds(0, 0, 534, 564);

lb6.setBounds(0, 0, 534, 564);

lb3.setIcon(new ImageIcon("img//11.png"));

lb4.setIcon(new ImageIcon("img//22.png"));

lb5.setIcon(new ImageIcon("img//33.png"));

lb6.setIcon(new ImageIcon("img//44.png"));

jp3.add(lb3);

jp4.add(lb4);

jp5.add(lb5);

jp6.add(lb6);

btn1.addActionListener(new shijian_mian(this));

btn2.addActionListener(new shijian_mian(this));

btn3.addActionListener(new shijian_mian(this));

btn4.addActionListener(new shijian_mian(this));

// 給投塊區(qū)域設(shè)置他們的大小和位置,也是使用setBound進行設(shè)置

jp1.setBounds(0, 0, 700, 100);

jp2.setBounds(0, 100, 150, 600);

jp3.setBounds(150, 100, 550, 600);

jp4.setBounds(150, 100, 550, 600);

jp5.setBounds(150, 100, 550, 600);

jp6.setBounds(150, 100, 550, 600);

jp1.setBorder(BorderFactory.createLineBorder(Color.red));

jp2.setBorder(BorderFactory.createLineBorder(Color.green));

jp3.setBorder(BorderFactory.createLineBorder(Color.blue));

jp4.setBorder(BorderFactory.createLineBorder(Color.red));

jp5.setBorder(BorderFactory.createLineBorder(Color.green));

jp6.setBorder(BorderFactory.createLineBorder(Color.blue));

// 將這三個區(qū)域添加到當(dāng)前窗體中

this.add(jp1);

this.add(jp2);

this.add(jp3);

this.add(jp4);

this.add(jp5);

this.add(jp6);

this.setDefaultCloseOperation(JFrame.EXIT_ON_CLOSE);

this.setVisible(true);

// this.setTitle("登錄后的界面");

// this.setLayout(null);

// this.setSize(800, 800);

// this.setLocationRelativeTo(null);

// this.setDefaultCloseOperation(JFrame.EXIT_ON_CLOSE);

// this.setVisible(true);

}

}

class shijian_mian implements ActionListener {

public chenggongjiemian dd = null;

public shijian_mian(chenggongjiemian d) {

dd = d;

}

@Override

public void actionPerformed(ActionEvent arg0) {

if (arg0.getSource() == dd.btn1) {

// 點擊的是第-一個按鈕執(zhí)行第一個按鈕的內(nèi)容

dd.jp3.setVisible(true);// 讓jp3的區(qū)域顯示，其他的區(qū)域隱藏

dd.jp4.setVisible(false);

dd.jp5.setVisible(false);

dd.jp6.setVisible(false);

} else if (arg0.getSource() == dd.btn2) {

// 點擊的是第2個按鈕執(zhí)行第2個按鈕的內(nèi)容

dd.jp4.setVisible(true);// 讓jp4的區(qū)域顯示，其他的區(qū)域隱藏

dd.jp3.setVisible(false);

dd.jp5.setVisible(false);

dd.jp6.setVisible(false);

} else if (arg0.getSource() == dd.btn3) {

// 點擊的是第3個按鈕執(zhí)行第3個按鈕的內(nèi)容

dd.jp5.setVisible(true);// 讓jp5的區(qū)域顯示，其他的區(qū)域隱藏

dd.jp4.setVisible(false);

dd.jp3.setVisible(false);

dd.jp6.setVisible(false);

} else if (arg0.getSource() == dd.btn4) {

// 點擊的是第4個按鈕執(zhí)行第4個按鈕的內(nèi)容

dd.jp6.setVisible(true);// 讓jp6的區(qū)域顯示，其他的區(qū)域隱藏

dd.jp4.setVisible(false);

dd.jp5.setVisible(false);

dd.jp3.setVisible(false);

}

}

}