java图形界面源码

发布时间: 2022-06-12 21:55:00

‘壹’ java图形界面设计实验，求源代码！

import javax.swing.*;
import java.awt.*;
import java.awt.event.ActionEvent;
import java.awt.event.ActionListener;

public class Calculator01 extends JFrame implements ActionListener {
JPanel jp1,jp2;
JTextField jt1,jt2,jt3;
JButton btn_add,btn_sub,btn_clean;

public Calculator01() {
init();
}

public void init() {
setTitle("简易计算器");
setLocationRelativeTo(null);
setSize(600, 100);
jp1 = new JPanel();
jp2 = new JPanel();
add(jp1, BorderLayout.NORTH);
add(jp2,BorderLayout.SOUTH);
jt1 = new JTextField(15);
jp1.add(jt1);
jt2 = new JTextField(15);
jp1.add(jt2);
jt3 = new JTextField(15);
jp1.add(jt3);

btn_add = new JButton("+");
btn_add.addActionListener(this);
jp2.add(btn_add);
btn_sub = new JButton("-");
btn_sub.addActionListener(this);
jp2.add(btn_sub);
btn_clean = new JButton("清除");
btn_clean.addActionListener(this);
jp2.add(btn_clean);

setVisible(true);
}

public void actionPerformed(ActionEvent e)
{
if (e.getSource() == btn_clean)
{
jt1.setText("");
jt2.setText("");
jt3.setText("");
}
else
{
if (jt1.getText().equals("") || jt2.getText().equals(""))
{
JOptionPane.showMessageDialog(null, "请在前两个框输入数字");
}
else
{
double number1=Double.parseDouble(jt1.getText());
double number2=Double.parseDouble(jt2.getText());
double result=0;
if (e.getSource() == btn_add)
{
result = number1 + number2;
}
else
{
result = number1 - number2;
}
jt3.setText(""+result);
}
}
}
}

‘贰’ 求一个简单的java代码：（图形界面）

直接写main函数里了
public static void main(String[] args) {

JFrame ck = new JFrame("title");
JPanel mb = new JPanel();
mb.setLayout(null);
String str = "test"; //自己定义要显示什么
JTextArea ta = new JTextArea(str);
ta.setBounds(0, 0, 100, 30); //自己定义文本区在窗口中的位置和大小
mb.add(ta);
ck.add(mb);
ck.setVisible(true);
ck.setBounds(200, 200, 500, 500); //自己定义窗口位置和大小

}

‘叁’ 用java图形界面（GUI）写java代码

package com.test;

import java.awt.FlowLayout;
import java.awt.event.ActionEvent;
import java.awt.event.ActionListener;

import javax.swing.JButton;
import javax.swing.JFrame;
import javax.swing.JLabel;

public class aaa extends JFrame implements ActionListener
{
JButton b1, b2 ; //定义两
}
public void actionPerformed(ActionEvent e)
{
if(e.getSource() == b1 )
{
l1.setVisible(true);
}
if(e.getSource() == b2)
{
this.dispose();
}
}

‘肆’ java绘图代码

画笔定义

importjava.awt.*;

/**

*@authorHardneedl

interfaceBrush{

voiddoPaint(Graphicsg);

}

画笔工厂

importjava.awt.*;

/**

*@authorHardneedl

classBrushFactory{

staticfinalintLINE_BRUSH=0;

staticfinalintELLIPSE_BBRUSH=1;

staticfinalintRECTANGLE_BRUSH=2;

staticfinalintPOLYGON_BRUSH=3;

staticfinalintELLIPSE_FILL_BRUSH=4;

staticfinalintRECTANGLE_FILL_BRUSH=5;

staticfinalBrushNO=newNONE();

staticfinalBrushLINE=newLineBrush();

staticfinalBrushELLIPSE=newEllipseBrush();

staticfinalBrushELLIPSE_FILL=newEllipseFillBrush();

staticfinalBrushRECTANGLE=newRectangleBrush();

staticfinalBrushRECTANGLE_FILL=newRectangleFillBrush();

staticfinalBrushPOLYGON=newPolygonBrush();

BrushgetBrush(intbrushIndex){

switch(brushIndex){

caseLINE_BRUSH:returnLINE;

caseELLIPSE_BBRUSH:returnELLIPSE;

caseRECTANGLE_BRUSH:returnRECTANGLE;

caseRECTANGLE_FILL_BRUSH:returnRECTANGLE_FILL;

casePOLYGON_BRUSH:returnPOLYGON;

caseELLIPSE_FILL_BRUSH:returnELLIPSE_FILL;

default:returnNO;

}

{

publicvoiddoPaint(Graphicsg){

Graphicsgg=g.create();

gg.setColor(Color.BLACK);

gg.drawLine(70,70,200,200);

gg.dispose();

}

{

publicvoiddoPaint(Graphicsg){

Graphicsgg=g.create();

gg.setColor(Color.PINK);

gg.drawOval(100,100,200,50);

gg.dispose();

}

{

publicvoiddoPaint(Graphicsg){

Graphicsgg=g.create();

gg.setColor(Color.PINK);

gg.fillOval(100,100,200,50);

gg.dispose();

}

{

publicvoiddoPaint(Graphicsg){

Graphicsgg=g.create();

gg.setColor(Color.RED);

gg.drawPolygon(newint[]{48,50,244,483,310},newint[]{36,192,281,302,77},5);

gg.dispose();

}

{

publicvoiddoPaint(Graphicsg){

Graphicsgg=g.create();

gg.setColor(Color.BLUE);

gg.drawRect(70,70,100,100);

gg.dispose();

}

{

publicvoiddoPaint(Graphicsg){

Graphicsgg=g.create();

gg.setColor(Color.BLUE);

gg.fillRect(70,70,100,100);

gg.dispose();

}

{

publicvoiddoPaint(Graphicsg){

Graphicsgg=g.create();

gg.setColor(Color.RED);

gg.drawString("Nobrushselected!",20,30);

gg.dispose();

}

图形界面

importjavax.swing.*;

importjavax.swing.border.*;

importjava.awt.*;

importjava.awt.event.*;

/**

*@authorHardneedl

finalclassDrawextendsJFrame{

publicStringgetTitle(){return"frametitle";}

=newDimension(600,400);

(){returnsize;}

publicDimensiongetMaximumSize(){returnsize;}

publicDimensiongetMinimumSize(){returnsize;}

publicDimensiongetSize(){returnsize;}

=newLineAction();

=newRectangleAction();

=newRectangleFillAction();

=newEllipseAction();

=newEllipseFillAction();

=newPolygonAction();

=newBrushFactory();

privatestaticBrushbrush;

=newJComponent(){

protectedvoidpaintComponent(Graphicsg){

super.paintComponent(g);

if(brush!=null){

brush.doPaint(g);

}

publicBordergetBorder(){returnBorderFactory.createLineBorder(Color.BLACK,2);}

};

Draw()throwsHeadlessException{

init();

attachListeners();

doLay();

}

privatevoidinit(){

JMenuBarmenuBar=newJMenuBar();

menuBar.add(newJMenu(lineAction));

JMenuelp=newJMenu("椭圆");

elp.add(ellipseAction);

elp.add(ellipseFillAction);

menuBar.add(elp);

JMenurct=newJMenu("矩形");

rct.add(rectangleAction);

rct.add(rectangleFillAction);

menuBar.add(rct);

menuBar.add(newJMenu(polygonAction));

setJMenuBar(menuBar);

}

privatevoidattachListeners(){

setDefaultCloseOperation(JFrame.EXIT_ON_CLOSE);

}

privatevoiddoLay(){

Containercontainer=getContentPane();

container.add(canvas,BorderLayout.CENTER);

JPanelbuttonsPane=newJPanel(newGridLayout(2,3));

buttonsPane.add(newJButton(lineAction));

buttonsPane.add(newJButton(ellipseAction));

buttonsPane.add(newJButton(rectangleAction));

buttonsPane.add(newJButton(polygonAction));

buttonsPane.add(Box.createHorizontalBox());

buttonsPane.add(newJButton(ellipseFillAction));

buttonsPane.add(newJButton(rectangleFillAction));

container.add(buttonsPane,BorderLayout.SOUTH);

pack();

setVisible(true);

}

{

privateRectangleAction(){super("空心矩形");}