java窗体界面代码 java窗体设计代码

急求JAVA简易计算器窗体设计代码

窗体写好了,运算你自己写

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import java.awt.Button;

import java.awt.GridLayout;

import javax.swing.JFrame;

import javax.swing.JLabel;

import javax.swing.JPanel;

import javax.swing.JTextField;

public class SimpleCalculator {

private JFrame f = new JFrame();

private JPanel firstPanel = new JPanel();

private JLabel firstNumLabel = new JLabel("第一个数字");

private JTextField number1 = new JTextField();

private JPanel secondPanel = new JPanel();

private Button add = new Button("+");

private Button mul = new Button("*");

private Button clear = new Button("清除");

private JPanel thirdPanel = new JPanel();

private JLabel resultLabel = new JLabel("结果为");

private JTextField result = new JTextField();

public SimpleCalculator(){

firstPanel.setLayout(new GridLayout(1, 2));

firstPanel.add(firstNumLabel);

firstPanel.add(number1);

secondPanel.setLayout(new GridLayout(1, 3));

secondPanel.add(add);

secondPanel.add(mul);

secondPanel.add(clear);

thirdPanel.setLayout(new GridLayout(1, 2));

thirdPanel.add(resultLabel);

thirdPanel.add(result);

f.add(new JLabel("简易计算器"));

f.add(firstPanel);

f.add(secondPanel);

f.add(thirdPanel);

f.setLayout(new GridLayout(4, 1));

f.setVisible(true);

f.pack();

f.setDefaultCloseOperation(JFrame.EXIT_ON_CLOSE);

}

public static void main(String[] args) {

new SimpleCalculator();

}

}

JAVA用frame实现图中2个窗口 怎么写啊?

图片看起来很模糊,隐约看到需要一个登录窗口,那就分享一下以前练习的登录窗口demo吧。

先上效果图:

登录界面

源码如下:

AbsoluteLoginFrame.java

public class AbsoluteLoginFrame extends JFrame {

private static final int LOGIN_WIDTH = 600;

private static final int LOGIN_HEIGHT = 400;

private static final long serialVersionUID = -2381351968820980500L;

public AbsoluteLoginFrame(){

  //设置窗口标题

  setTitle("登录界面");

  //设置一个初始面板,填充整个窗口

  JPanel loginPanel = new JPanel();

  //设置背景颜色

  loginPanel.setBackground(new Color(204, 204, 204));//#CCC

  loginPanel.setLayout(null);

  JPanel centerPanel = new JPanel();

  centerPanel.setBackground(Color.WHITE);

  centerPanel.setBounds(114, 70, 360, 224);

  centerPanel.setLayout(null);

  JLabel jLabel = new JLabel("用户名:");

  jLabel.setOpaque(true);

  jLabel.setBackground(Color.YELLOW);

  jLabel.setBounds(60, 60, 54, 20);

  JLabel label = new JLabel("密    码:");

  label.setOpaque(true);

  label.setBackground(Color.CYAN);

  label.setBounds(60, 90, 54, 20);

  JTextField textField = new JTextField(15);

  textField.setBounds(130, 60, 166, 21);

  JPasswordField passwordField = new JPasswordField(15);

  passwordField.setBounds(130, 90, 166, 21);

  JButton jButton = new JButton("登录");

  jButton.setBounds(148, 120, 62, 28);

  centerPanel.add(jLabel);

  centerPanel.add(label);

  centerPanel.add(textField);

  centerPanel.add(jButton);

  centerPanel.add(passwordField);

  loginPanel.add(centerPanel);

  getContentPane().add(loginPanel);//将初始面板添加到窗口中

  setSize(LOGIN_WIDTH, LOGIN_HEIGHT);//设置窗口大小

  setLocation(Screen.getCenterPosition(LOGIN_WIDTH, LOGIN_HEIGHT));//设置窗口位置

  setDefaultCloseOperation(EXIT_ON_CLOSE);//设置窗口默认关闭方式

  setResizable(false);

  setVisible(true);

}

public static void main(String[] args) {

  new AbsoluteLoginFrame();

}

}

Screen.java

public class Screen {

private int width;

private int height;

public Screen(){

  Toolkit toolkit = Toolkit.getDefaultToolkit();

  Dimension screenSize = toolkit.getScreenSize();

  this.width = screenSize.width;

  this.height = screenSize.height;

}

public static Point getCenterPosition(int width, int height){

  Screen screen = new Screen();

  int x = (screen.getWidth() - width) / 2;

  int y = (screen.getHeight() - height) / 2;

  return new Point(x, y);

}

public int getWidth() {

  return width;

}

public void setWidth(int width) {

  this.width = width;

}

public int getHeight() {

  return height;

}

public void setHeight(int height) {

  this.height = height;

}

}

求java窗体代码,可以显示默认长文本,代码格式最好规范可以直接使用。

importjava.awt.*;importjava.awt.event.*;importjava.awt.geom.*;importjava.util.*;importjavax.swing.*;/***多线程,小球演示.打开Windows任务管理器,可看到线程变化。可搜索到,run()方法/.start()**du:程序技巧体会:所谓产生一个小球,即是new其类对象,其属性携带画小球的坐标、颜色、所在容器等参数。**一个类,属性用来作为参数容器用,方法.完成功能。**///运行类publicclassBouncePress{//publicstaticvoidmain(String[]args){JFrameframe=newBouncePressFrame();//生成窗口。执行构造。-----业务逻辑。frame.setDefaultCloseOperation(JFrame.EXIT_ON_CLOSE);//similarto//window//listenerframe.show();}}classBouncePressFrameextendsJFrame{privateBallPressCanvascanvas;publicBouncePressFrame(){setSize(600,500);//窗口大小setTitle("BounceBall");ContainercontentPane=getContentPane();//Swing的窗口不能直接放入东西,只能在其上的ContentPane上放。canvas=newBallPressCanvas();//生成一个新面板。-----canvascontentPane.add(canvas,BorderLayout.CENTER);//窗口中心加入该面板。JPanelbuttonPanel=newJPanel();//再生成一个新面板。----buttonPanel//调用本类方法addButton。addButton(buttonPanel,"Start",//生成一个按钮"Start"---加入面板buttonPanelnewActionListener(){//|------按钮绑上action监听器。publicvoidactionPerformed(ActionEventevt){//|小球容器对象的addBall(Thread.NORM_PRIORITY-4,Color.black);//事件处理时,执行---addBall()方法。---产生小球(参数对象)---加入List中---开始画球。}});//按一次,addBall()一次---产生一个新小球---加入List中---开始画此新小球。//---画球线程BallPressThread的run()---小球(参数对象).move()---每次画时,先移动,再判断,再画。//---BallPressCanvas类的canvas对象.paint()---自动调BallPressCanvas类的paintComponent(Graphics//g)方法。//---该方法,从List中循环取出所有小球,第i个球,---调该小球BallPress类//.draw()方法---调Graphics2D方法画出小球。--使用color/addButton(buttonPanel,"Express",newActionListener(){publicvoidactionPerformed(ActionEventevt){addBall(Thread.NORM_PRIORITY+2,Color.red);}});addButton(buttonPanel,"Close",newActionListener(){publicvoidactionPerformed(ActionEventevt){System.exit(0);}});contentPane.add(buttonPanel,BorderLayout.SOUTH);}publicvoidaddButton(Containerc,Stringtitle,ActionListenerlistener){JButtonbutton=newJButton(title);//生成一个按钮。c.add(button);//加入容器中。button.addActionListener(listener);//按钮绑上action监听器。}/**主要业务方法。*/publicvoidaddBall(intpriority,Colorcolor){//生成小球(参数对象)BallPressb=newBallPress(canvas,color);//生成BallPress对象,携带、初始化//画Ball形小球,所需参数:所在容器组件,所需color--black/red.//小球加入List中。canvas.add(b);//面板canvas的ArrayList中加入BallPress对象。BallPressThreadthread=newBallPressThread(b);//生成画小球的线程类BallPressThread对象。传入BallPress对象(携带了画球所需//容器、color参数)。thread.setPriority(priority);thread.start();//callrun(),ballstarttomove//画球线程开始。---BallPressThread的run()---小球(参数对象).move()---先移动,再画。canvas.paint---BallPressCanvas类的}}//画球的线程类。classBallPressThreadextendsThread{privateBallPressb;publicBallPressThread(BallPressaBall){b=aBall;}//画球开始。publicvoidrun(){try{for(inti=1;i自动绘制面板,且自动调paintComponent(Graphics//g)方法,---重写该方法,绘制面板(及其上组件)。//作用2)该类对象属性ArrayListballs---兼作小球(参数对象)的容器。classBallPressCanvasextendsJPanel{privateArrayListballs=newArrayList();publicvoidadd(BallPressb){balls.add(b);//向ArrayList中添加球。当按下按钮,添加多个球时,都保存在这个List中。}//重写了javax.swing.JComponent的paintComponent()方法。//paint()方法自动调用该方法。publicvoidpaintComponent(Graphicsg){super.paintComponent(g);Graphics2Dg2=(Graphics2D)g;for(inti=0;i=canvas.getWidth()){//小球右边已经到画板右边。x=canvas.getWidth()-15;dx=-dx;//开始反向运动。}if(y=canvas.getHeight()){//小球已到画板顶。y=canvas.getHeight()-15;dy=-dy;}canvas.paint(canvas.getGraphics());//画出面板对象canvas----(及其上所有组件)////.paint()方法,自动调用}}/*importjava.awt.*;importjava.awt.event.*;importjava.awt.geom.*;importjava.util.*;importjavax.swing.*;*//***单线程,小球演示搜索不到,run()方法/.start()*//*publicclassBounce{publicstaticvoidmain(String[]args){JFrameframe=newBounceFrame();frame.setDefaultCloseOperation(JFrame.EXIT_ON_CLOSE);//similarto//window//listenerframe.show();}}不懂的再问啊。。。

一个窗体,一个按钮,最简单的java代码怎写?

public class Demo extends JFrame

{

JButton jb; //一个按钮

public static void main(String []args){

new Demo();

}

public Demo()

{

this.setLayout(new FlowLayout());

jb=new JButton("按扭");

this.add(jb);

this.setSize(400,300);

this.setVisible(true);

this.setLocation(500, 200);

}

}


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