java圖形界面代碼

import?java.awt.*;

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import?java.awt.event.*;

import?java.io.*;

import?javax.swing.*;

public?class?ReadBook?extends?JFrame?{

JTextArea?jta;

JTextField?jtf;

JButton?jb;

public?ReadBook()?{

jta?=?new?JTextArea();

jtf?=?new?JTextField(30);

jtf.setText("文件保存路徑如c:\\ab.txt");

jb?=?new?JButton("保存文字");

JPanel?jp?=?new?JPanel();

jp.add(jtf);

jp.add(jb);

add(jta);

add(jp,?BorderLayout.SOUTH);

setBounds(500,?100,?500,?380);

setDefaultCloseOperation(JFrame.EXIT_ON_CLOSE);

setVisible(true);

jb.addActionListener(new?ActionListener()?{

@Override

public?void?actionPerformed(ActionEvent?e)?{

//-------------核心代碼---------

String?path?=?jtf.getText();

File?f?=?new?File(path);

String?txt?=?jta.getText().replaceAll("\n",?"\r\n");

try?{

BufferedWriter?bw?=?new?BufferedWriter(new?FileWriter(f));

bw.write(txt);//寫入文件中

bw.close();

}?catch?(Exception?e1)?{

e1.printStackTrace();

}

//-------------核心代碼---------

}

});

}

public?static?void?main(String[]?args)?{

new?ReadBook();

}

}

java圖形界面編程

//這是哪個背景類

import java.awt.Image;

import java.awt.*;

import javax.swing.*;

public class ImageBack extends JPanel{

Image im = null;

public imageback(Image im){

this.im=im;

int width = Toolkit.getDefaultToolkit().getScreenSize().width;

int height = Toolkit.getDefaultToolkit().getScreenSize().height;

this.setSize(width,height);

this.setVisible(true);

}

public static void main(String args[]){

}

public void paintComponent(Graphics g){

//清屏

super.paintComponent(g);

g.drawImage(im, 0, 0, this.getWidth(),this.getHeight(),this);

}

}

import javax.swing.*;

import java.io.File;

import java.io.IOException;

import java.net.*;

/**

* 學生管理系統(tǒng)主界面

*/

public class StuMain extends JFrame{

//背景圖片

Image image=null;

public StuMain() {

try {

image = ImageIO.read(new File("images/start.jpg"));

} catch (IOException e) {

// TODO Auto-generated catch block

e.printStackTrace();

}

//把你要的背景圖片放到背景面板里

imageback im = new imageback(image);

//把有背景的圖片的JPanel放到JFrame里面

this.add(im);

//添加框架的關(guān)閉事件處理

this.setDefaultCloseOperation(JFrame.EXIT_ON_CLOSE);

this.pack();

//設(shè)置框架的大小

//設(shè)置標題

this.setTitle("學生管理系統(tǒng)");

this.setVisible(true);

}

public static void main(String args[]){

new StuMain();

}

}

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Java編寫圖形用戶界面程序

運行如圖

參考代碼如下

import?java.awt.*;

import?java.awt.event.*;

import?javax.swing.*;

public?class?RegDemo?extends?JFrame?implements?ActionListener{

JTextField?jtf;

JPasswordField?jpf;

public?RegDemo()?{

//組件的創(chuàng)建,?和布局安排

JPanel?jpc?=?new?JPanel();//默認流式布局

JPanel?jp1?=?new?JPanel(new?GridLayout(2,?2,5,10));//網(wǎng)格布局

jp1.setBorder(BorderFactory.createTitledBorder("用戶注冊"));

JLabel?jl1?=?new?JLabel("用戶名:");

jtf?=?new?JTextField(10);

JLabel?jl2?=?new?JLabel("密碼:");

jpf?=?new?JPasswordField(10);

jpf.setEchoChar('*');//用*號來隱藏密碼的顯示

jp1.add(jl1);jp1.add(jtf);

jp1.add(jl2);jp1.add(jpf);

jpc.add(jp1);

add(jpc);

JButton?jb1?=?new?JButton("提交");

jb1.addActionListener(this);

jb1.setActionCommand("yes");

JButton?jb2?=?new?JButton("取消");

jb2.addActionListener(this);

jb2.setActionCommand("no");

JPanel?jp2?=?new?JPanel();

jp2.add(jb1);jp2.add(jb2);

add(jp2,BorderLayout.SOUTH);

setTitle("用戶注冊界面");

setSize(280,?280);

setLocationRelativeTo(null);//窗口居中

setDefaultCloseOperation(EXIT_ON_CLOSE);//

setVisible(true);

}

public?static?void?main(String[]?args)?{

new?RegDemo();

}

@Override

public?void?actionPerformed(ActionEvent?e)?{

if(e.getActionCommand().equals("yes")){

String?name??=?jtf.getText().trim();

String?pwd?=?new?String(jpf.getPassword());

if(name.equals("")||pwd.equals("")){

JOptionPane.showMessageDialog(this,?"你還沒有輸入用戶名或者密碼");

}else{

JOptionPane.showMessageDialog(this,?"注冊成功!用戶名"+name+",密碼"+pwd);

}

}else{

jtf.setText("");

jpf.setText("");

}

}

}

java編寫一個圖形界面程序

import?java.awt.*;

import?java.awt.event.*;

import?java.util.*;

import?javax.swing.*;

import?javax.swing.border.Border;

class?MainFrame?extends?JFrame?{

private?static?final?long?serialVersionUID?=?1L;

private?MapString,?Integer?sizes?=?new?HashMapString,?Integer();

private?MapString,?Integer?styles?=?new?HashMapString,?Integer();

private?MapString,?Integer?toppings?=?new?HashMapString,?Integer();

public?MainFrame()?{

sizes.put("Extra?Large",?10);

sizes.put("Large",?8);

sizes.put("Medium",?5);

sizes.put("Small",?3);

styles.put("Deep?Dish",?20);

styles.put("Regular",?10);

styles.put("Thin?Crust",?5);

styles.put("Chicago",?3);

toppings.put("Cheese",?8);

toppings.put("Tomato",?7);

toppings.put("Peppers",?6);

toppings.put("Peperoni",?5);

this.setTitle("布局及事件處理");

this.setSize(450,?350);

this.setLayout(new?BorderLayout());

this.setDefaultCloseOperation(JFrame.EXIT_ON_CLOSE);

JLabel?lblTitle?=?new?JLabel();

lblTitle.setText("Pizzeria?Juno");

lblTitle.setFont(new?Font("宋體",?Font.BOLD,?36));

lblTitle.setHorizontalAlignment(SwingConstants.CENTER);

this.add("North",?lblTitle);

JPanel?bodyPanel?=?new?JPanel();

bodyPanel.setLayout(new?GridLayout(2,?1));

this.add("Center",?bodyPanel);

JPanel?listPanel?=?new?JPanel();

listPanel.setLayout(new?GridLayout(1,?3));

listPanel.setSize(200,?200);

bodyPanel.add(listPanel);

Border?lineBorder?=?BorderFactory.createLineBorder(Color.BLACK);

JPanel?sizePanel?=?new?JPanel();

sizePanel.setLayout(new?BorderLayout());

listPanel.add(sizePanel);

JLabel?sizeTitle?=?new?JLabel();

sizeTitle.setText("Sizes");

sizePanel.add("North",?sizeTitle);

JList?sizeList?=?new?JList(sizes.keySet().toArray());

sizeList.setSize(100,?100);

sizeList.setBorder(lineBorder);

sizeList.setSelectionMode(ListSelectionModel.SINGLE_SELECTION);

sizePanel.add(sizeList);

JPanel?stylePanel?=?new?JPanel();

stylePanel.setLayout(new?BorderLayout());

listPanel.add(stylePanel);

JLabel?styleTitle?=?new?JLabel();

styleTitle.setText("Styles");

stylePanel.add("North",?styleTitle);

JList?styleList?=?new?JList(styles.keySet().toArray());

styleList.setSize(100,?100);

styleList.setBorder(lineBorder);

styleList.setSelectionMode(ListSelectionModel.SINGLE_SELECTION);

stylePanel.add(styleList);

JPanel?toppingPanel?=?new?JPanel();

toppingPanel.setLayout(new?BorderLayout());

listPanel.add(toppingPanel);

JLabel?toppingTitle?=?new?JLabel();

toppingTitle.setText("Toppings");

toppingPanel.add("North",?toppingTitle);

JList?toppingList?=?new?JList(toppings.keySet().toArray());

toppingList.setSize(100,?100);

toppingList.setBorder(lineBorder);

toppingPanel.add(toppingList);

JTextArea?txtResult?=?new?JTextArea();

txtResult.setEditable(false);

bodyPanel.add(txtResult);

JPanel?bottomPanel?=?new?JPanel();

bottomPanel.setLayout(new?GridLayout(1,?3));

this.add("South",?bottomPanel);

JLabel?label1?=?new?JLabel("Click?to?complete?order");

bottomPanel.add(label1);

JButton?btnRingUp?=?new?JButton("Ring?up");

btnRingUp.addActionListener(new?ActionListener()?{

@Override

public?void?actionPerformed(ActionEvent?e)?{

if(sizeList.getSelectedValue()?==?null)?{

JOptionPane.showMessageDialog(MainFrame.this,?"Please?select?size.");

return;

}

if(styleList.getSelectedValue()?==?null)?{

JOptionPane.showMessageDialog(MainFrame.this,?"Please?select?style.");

return;

}

if(toppingList.getSelectedValue()?==?null)?{

JOptionPane.showMessageDialog(MainFrame.this,?"Please?select?topping.");

return;

}

float?total?=?0;

String?size?=?sizeList.getSelectedValue().toString();

total?+=?sizes.get(size);

String?style?=?styleList.getSelectedValue().toString();

total?+=?styles.get(style);

String?result?=?size?+?"?Pizza,?"?+?style?+?"?Style";

Object[]?toppings?=?toppingList.getSelectedValues();

for(Object?topping?:?toppings)?{

result?+=?"\n??+"?+?topping.toString();

total?+=?MainFrame.this.toppings.get(topping.toString());

}

result?+=?"\n??Total:?"?+?total;

txtResult.setText(result);

}

});

bottomPanel.add(btnRingUp);

JButton?btnQuit?=?new?JButton("Quit");

btnQuit.addActionListener(new?ActionListener()?{

@Override

public?void?actionPerformed(ActionEvent?e)?{

MainFrame.this.dispose();

}

});

bottomPanel.add(btnQuit);

}

}

public?class?App?{

public?static?void?main(String[]?args)?{

MainFrame?mainFrame?=?new?MainFrame();

mainFrame.setVisible(true);

}

}

求一個簡單的java代碼：（圖形界面）

import java.awt.Color;

import java.awt.Dimension;

import java.awt.Toolkit;

import java.awt.event.ActionEvent;

import java.awt.event.ActionListener;

import javax.swing.JButton;

import javax.swing.JDialog;

import javax.swing.JLabel;

import javax.swing.JOptionPane;

import javax.swing.JPasswordField;

import javax.swing.JTextField;

public class vv extends JDialog {

private static final long serialVersionUID = 1L;

private JLabel l_Id = new JLabel("登陸賬戶", JLabel.CENTER);

private JLabel l_pw = new JLabel("登陸密碼", JLabel.CENTER);

private JTextField t_Id = new JTextField(10);

private JPasswordField t_pw = new JPasswordField(10);

private JButton btnLogin;

private JButton btnClose;

public vv() {

super();

setResizable(false);

getContentPane().setBackground(new Color(225, 225, 225));

getContentPane().setLayout(null);

initialize();

}

protected void initialize() {

setTitle("系統(tǒng)登錄");

l_Id.setBounds(48, 43, 53, 25);

t_Id.setBounds(110, 43, 150, 25);

l_pw.setBounds(48, 93, 53, 25);

t_pw.setBounds(110, 93, 150, 25);

getContentPane().add(l_Id);

getContentPane().add(l_pw);

getContentPane().add(t_Id);

getContentPane().add(t_pw);

btnLogin = new JButton();

btnLogin.setText("登 錄");

btnLogin.setBounds(70, 142, 85, 28);

btnLogin.addActionListener(new ActionListener() {

public void actionPerformed(ActionEvent e) {

addBtnLoginActionListener();

}

});

getContentPane().add(btnLogin);

btnClose = new JButton();

btnClose.setText("關(guān) 閉");

btnClose.setBounds(175, 142, 85, 28);

btnClose.addActionListener(new ActionListener() {

public void actionPerformed(ActionEvent e) {

dispose();

System.exit(-1);

}

});

getContentPane().add(btnClose);

}

private void addBtnLoginActionListener() {

String user = t_Id.getText();

String password = new String(t_pw.getPassword());

if (user.equals("")) {

JOptionPane.showMessageDialog(this, "帳號不可為空", "Caution",

JOptionPane.WARNING_MESSAGE);

return;

}

if (password.equals("")) {

JOptionPane.showMessageDialog(this, "密碼不可為空", "Caution",

JOptionPane.WARNING_MESSAGE);

return;

}

String sql = "select * FROM login WHERE id = '" + user + "' and pw = '"

+ password + "'";

boolean success = false;

// TODO:數(shù)據(jù)校驗 success = executeQuery(sql);

if (success) {

// TODO： 如果數(shù)據(jù)校驗成功 顯示主界面 并關(guān)閉登錄界面

JOptionPane.showMessageDialog(this, "成功登錄", "提示",

JOptionPane.INFORMATION_MESSAGE);

this.dispose();

} else {

JOptionPane.showMessageDialog(this, "帳號或密碼錯誤!", "警告",

JOptionPane.WARNING_MESSAGE);

t_pw.requestFocus(); // 密碼框選中

}

}

public Dimension getPreferredSize() {

return new Dimension(320, 170);

}

public void show() {

Toolkit tk = Toolkit.getDefaultToolkit();

Dimension screen = tk.getScreenSize();

Dimension d = getSize();

this.setLocation((screen.width - d.width) / 2,

(screen.height - d.height) / 2);

// 輸入密碼后回車相當于點擊了登錄按鈕

getRootPane().setDefaultButton(btnLogin);

t_pw.requestFocus();

setDefaultCloseOperation(DISPOSE_ON_CLOSE);

setSize(300, 220);

super.show();

}

public static void main(String[] args) {

vv loginFrame = new vv();

loginFrame.setVisible(true);

}

}

希望對你有幫助