如何用Java編寫一個繪制圖形的小程序？

import java.awt.*;

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import java.awt.event.*;

import java.awt.geom.*;

import javax.swing.*;

//不規(guī)則圖形的繪制

public class IrregularShapeDemo extends JFrame {

GeneralPath gPath= new GeneralPath(); //GeneralPath對象實例

Point aPoint;

//構(gòu)造函數(shù)

public IrregularShapeDemo() {

super("不規(guī)則圖形的繪制"); //調(diào)用父類構(gòu)造函數(shù)

enableEvents(AWTEvent.MOUSE_EVENT_MASK|AWTEvent.MOUSE_MOTION_EVENT_MASK); //允許事件

setSize(300, 200); //設(shè)置窗口尺寸

setVisible(true); //設(shè)置窗口可視

setDefaultCloseOperation(JFrame.EXIT_ON_CLOSE); //關(guān)閉窗口時退出程序

}

public void paint(Graphics g) { //重載窗口組件的paint()方法

Graphics2D g2D = (Graphics2D)g; //獲取圖形環(huán)境

g2D.draw(gPath); //繪制路徑

}

public static void main(String[] args) {

new IrregularShapeDemo();

}

protected void processMouseEvent(MouseEvent e) { //鼠標(biāo)事件處理

if(e.getID() == MouseEvent.MOUSE_PRESSED) {

aPoint = e.getPoint(); //得到當(dāng)前鼠標(biāo)點

gPath = new GeneralPath(); //重新實例化GeneralPath對象

gPath.moveTo(aPoint.x,aPoint.y); //設(shè)置路徑點

}

}

protected void processMouseMotionEvent(MouseEvent e) { //鼠標(biāo)運動事件處理

if(e.getID() == MouseEvent.MOUSE_DRAGGED) {

aPoint = e.getPoint(); //得到當(dāng)前鼠標(biāo)點

gPath.lineTo(aPoint.x, aPoint.y); //設(shè)置路徑

gPath.moveTo(aPoint.x, aPoint.y);

repaint(); //重繪組件

}

}

}

用java編寫一個圖形化界面小程序，swing窗體定義4個標(biāo)簽對象，分別是：用戶名、輸入料號、掃描條碼等。

用java編寫一個圖形化界面小程序，swing窗體定義4個標(biāo)簽對象，分別是：用戶名、輸入料號數(shù)量、掃描條碼等。另外定義兩個按鈕對象（確定、取消）

上面這些你肯定會的

至于

用戶點擊確定按鈕功能之后把以上數(shù)據(jù)（用戶名、料號數(shù)量、條碼、還有用戶操作日期）統(tǒng)計在excel表中

如果本地測試的話，就新建一個excel，可以搜索相關(guān)java操作excel的代碼，有jxl和poi，

首先查找設(shè)定的excel名字，如果沒有創(chuàng)建一個；

還可以保存到數(shù)據(jù)庫，提供實時導(dǎo)出excel

求一個簡單的Java 小程序源文件！高分懸賞！

給你個計算器的，

import java.awt.BorderLayout;

import java.awt.GridLayout;

import java.awt.event.MouseEvent;

import java.awt.event.MouseListener;

import java.text.DecimalFormat;

import javax.swing.JButton;

import javax.swing.JFrame;

import javax.swing.JPanel;

import javax.swing.JTextField;

public class Calculator {

//計算器面板

private JFrame f = new JFrame("Calculator");

//輸入面扳

private JPanel inputPanel = new JPanel();

//加減乘除面板

private JPanel operationPanel = new JPanel();

//數(shù)字面板

private JPanel buttonsPanel = new JPanel();

//輸入數(shù)據(jù)文本框

private JTextField input = new JTextField(20);

//退格鍵

private JButton backspace = new JButton("BackSpace");

//清空

private JButton CE = new JButton("CE ");

//刪除

private JButton C = new JButton("C ");

//四則運算符號鍵

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

private JButton sub = new JButton("-");

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

private JButton div = new JButton("/");

//小數(shù)點

private JButton decimal = new JButton(".");

//等號

private JButton equal = new JButton("=");

//數(shù)字鍵

private JButton zero = new JButton("0");

private JButton one = new JButton("1");

private JButton two = new JButton("2");

private JButton three = new JButton("3");

private JButton four = new JButton("4");

private JButton five = new JButton("5");

private JButton six = new JButton("6");

private JButton seven = new JButton("7");

private JButton eight = new JButton("8");

private JButton nine = new JButton("9");

private String num1 = "";//保存第一個運算數(shù)字

private String operator = "";//保存運算符號

public static void main(String[] args) {

new Calculator();//new計算器實例

}

public Calculator(){

//添加組件，布局

inputPanel.add(input);

f.add(inputPanel, BorderLayout.NORTH);

operationPanel.add(backspace);

operationPanel.add(CE);

operationPanel.add(C);

f.add(operationPanel, BorderLayout.CENTER);

buttonsPanel.add(add);

buttonsPanel.add(sub);

buttonsPanel.add(mul);

buttonsPanel.add(div);

buttonsPanel.add(one);

buttonsPanel.add(two);

buttonsPanel.add(three);

buttonsPanel.add(zero);

buttonsPanel.add(four);

buttonsPanel.add(five);

buttonsPanel.add(six);

buttonsPanel.add(decimal);

buttonsPanel.add(seven);

buttonsPanel.add(eight);

buttonsPanel.add(nine);

buttonsPanel.add(equal);

buttonsPanel.setLayout(new GridLayout(4, 4));

f.add(buttonsPanel, BorderLayout.SOUTH);

//注冊各個組件監(jiān)聽事件

backspace.addMouseListener(new OperationMouseListener());

CE.addMouseListener(new OperationMouseListener());

C.addMouseListener(new OperationMouseListener());

decimal.addMouseListener(new OperationMouseListener());

equal.addMouseListener(new OperationMouseListener());

//注冊四則運算監(jiān)聽

add.addMouseListener(new CalcMouseListener());

sub.addMouseListener(new CalcMouseListener());

mul.addMouseListener(new CalcMouseListener());

div.addMouseListener(new CalcMouseListener());

//注冊數(shù)字監(jiān)聽事件

zero.addMouseListener(new NumberMouseListener());

one.addMouseListener(new NumberMouseListener());

two.addMouseListener(new NumberMouseListener());

three.addMouseListener(new NumberMouseListener());

four.addMouseListener(new NumberMouseListener());

five.addMouseListener(new NumberMouseListener());

six.addMouseListener(new NumberMouseListener());

seven.addMouseListener(new NumberMouseListener());

eight.addMouseListener(new NumberMouseListener());

nine.addMouseListener(new NumberMouseListener());

f.setVisible(true);

f.pack();

f.setDefaultCloseOperation(JFrame.EXIT_ON_CLOSE);

}

private class NumberMouseListener implements MouseListener{

public void mouseClicked(MouseEvent e) {

if(input.getText().trim().equals("0")){//如果文本框已經(jīng)是0，結(jié)果還是0

input.setText(((JButton)e.getSource()).getText().trim());

}else{//否則的話，把0添加到后面，譬如文本框是1，結(jié)果就為10

input.setText(input.getText().concat(((JButton)e.getSource()).getText().trim()));

}

}

public void mouseEntered(MouseEvent e) {}

public void mouseExited(MouseEvent e) {}

public void mousePressed(MouseEvent e) {}

public void mouseReleased(MouseEvent e) {}

}

private class CalcMouseListener implements MouseListener{

//如果輸入的是運算符號，保存第一個結(jié)果和運算符號

public void mouseClicked(MouseEvent e) {

num1 = input.getText().trim();input.setText("");

operator = ((JButton)e.getSource()).getText().trim();

}

public void mouseEntered(MouseEvent e) {}

public void mouseExited(MouseEvent e) {}

public void mousePressed(MouseEvent e) {}

public void mouseReleased(MouseEvent e) {}

}

private class OperationMouseListener implements MouseListener{

public void mouseClicked(MouseEvent e) {

if(e.getSource() == backspace){//退格鍵，刪除一個直到?jīng)]有字符刪除

String inputText = input.getText();

if(inputText.length() 0){

input.setText(inputText.substring(0, inputText.length() - 1));

}

}else if(e.getSource() == C){

input.setText("0");//C，清空所有運算數(shù)字和符號

num1 = "";

}else if(e.getSource() == CE){

input.setText("0");//CE--將文本框置為0

}else if(e.getSource() == decimal){

String text = input.getText().trim();

//如果按了小數(shù)點，如果文本框已經(jīng)有小數(shù)點，不做任何操作，否則在結(jié)果后面加上小數(shù)點

if(text.indexOf(".") == -1){

input.setText(text.concat("."));

}

}else if(e.getSource() == equal){

//如果是等號

if(!operator.trim().equals("")){

if(!input.getText().trim().equals("")){

double result = 0D;

if(operator.equals("+")){//執(zhí)行加法運算

result = Double.parseDouble(num1) + Double.parseDouble(input.getText().trim());

}else if(operator.equals("-")){//減法運算

result = Double.parseDouble(num1) - Double.parseDouble(input.getText().trim());

}else if(operator.equals("*")){//乘法運算

result = Double.parseDouble(num1) * Double.parseDouble(input.getText().trim());

}else if(operator.equals("/")){//除法運算

result = Double.parseDouble(num1) / Double.parseDouble(input.getText().trim());

}

//格式化最終結(jié)果，保留兩位小數(shù)點

input.setText(new DecimalFormat("0.00").format(result));

}

}

}

}

public void mouseEntered(MouseEvent e) {}

public void mouseExited(MouseEvent e) {}

public void mousePressed(MouseEvent e) {}

public void mouseReleased(MouseEvent e) {}

}

}

用java的圖形界面設(shè)計寫一個小程序，題目要求如下，在線等。。急急急、、、

import java.awt.event.ActionEvent;

import java.awt.event.ActionListener;

import javax.swing.JButton;

import javax.swing.JFrame;

import javax.swing.JLabel;

public class test extends JFrame { private static final long serialVersionUID = 1L;

public static void main(String args[]) {

test frame = new test();

frame.setVisible(true);

}

public test() {

super();

getContentPane().setLayout(null);

setBounds(100, 100, 236, 193);

setDefaultCloseOperation(JFrame.EXIT_ON_CLOSE);

final JLabel label = new JLabel();

label.setText("0");

label.setBounds(62, 33, 79, 18);

getContentPane().add(label);

final JButton button = new JButton();

button.addActionListener(new ActionListener() {

public void actionPerformed(final ActionEvent e) {

label.setText(String.valueOf((Integer.valueOf(label.getText())+1)));

}

});

button.setText("點擊");

button.setBounds(50, 93, 106, 28);

getContentPane().add(button);

}

}

求JAVA大神給我發(fā)一段完整可運行的java圖形小程序的代碼（不用太多類），謝謝了

/*計算器*/

import java.awt.*;

import javax.swing.*;

import javax.swing.border.*;

import java.awt.event.*;

public class Calculator implements ActionListener{

JFrame frame;

JPanel panel;

JTextField tfShow;/*定義顯示文本框*/

JButton b1[]=new JButton[10]; /*數(shù)字按鈕*/

JButton b2[]=new JButton[6]; /*操作按鈕*/

boolean isNumber;/*判斷是否輸入多位數(shù)字的變量*/

double number;/*存儲輸入數(shù)值、顯示結(jié)果的變量*/

double result;/*存儲中間運算結(jié)果的變量*/

char operator;/*存儲當(dāng)前操作符的成員變量*/

public Calculator(){

frame=new JFrame("計算器");

frame.setSize(300,300);/*指定框架窗口的大小*/

frame.setResizable(false);/*使框架窗口不可改變大小*/

JPanel contentPane=(JPanel)frame.getContentPane();

contentPane.setBorder(new EmptyBorder(20,20,20,20));/*繪制框架的指定大小的空透明邊框*/

tfShow=new JTextField("0",25);/*指定屬性的文本域*/

tfShow.setHorizontalAlignment(JTextField.RIGHT);/*設(shè)置文本域中文本的對齊方式*/

isNumber=true;/*初始值設(shè)置*/

number=0;/*初始值設(shè)置*/

result=0;/*初始值設(shè)置*/

operator=' ';/*初始值設(shè)置*/

for(int i=0;ib1.length;i++){

b1[i]=new JButton(Integer.toString(i));/*創(chuàng)建數(shù)字按鈕*/

b1[i].setActionCommand(Integer.toString(i));

b1[i].addActionListener(this);

b1[i].setForeground(Color.blue);

}

String bs[]={"/","*","-","C","+","="};

for(int i=0;ib2.length;i++){

b2[i]=new JButton(bs[i]);/*創(chuàng)建操作按鈕*/

b2[i].setActionCommand(bs[i]);

b2[i].addActionListener(this);

b2[i].setForeground(Color.red);

}

panel=new JPanel();

panel.setLayout(new GridLayout(4,5));

panel.add(b1[1]);

panel.add(b1[2]);

panel.add(b1[3]);

panel.add(b2[0]);

panel.add(b1[4]);

panel.add(b1[5]);

panel.add(b1[6]);

panel.add(b2[1]);

panel.add(b1[7]);

panel.add(b1[8]);

panel.add(b1[9]);

panel.add(b2[2]);

panel.add(b1[0]);

panel.add(b2[3]);

panel.add(b2[4]);

panel.add(b2[5]);

frame.add(tfShow,BorderLayout.NORTH);/*將文本框放置在框架上方*/

frame.add(panel,BorderLayout.CENTER);/*將裝有按鈕組的panel放在框架的中心*/

frame.setDefaultCloseOperation(JFrame.EXIT_ON_CLOSE);/*設(shè)置框架窗口的默認(rèn)窗口關(guān)閉操作*/

frame.setVisible(true);/*設(shè)置框架可見*/

}

public double getDisplay(){/*返回要顯示的結(jié)果*/

return number;

}

public void reDisplay(){/*刷新文本域的內(nèi)容*/

tfShow.setText(""+getDisplay());

}

/*對輸入數(shù)字的處理*/

public void numberProcess(int num){

if(isNumbernum!=0){

String s1=Integer.toString(num);

String s2=Integer.toString((int)(this.number));

this.number=Double.parseDouble(s2+s1);/*對多位數(shù)字的處理*/

}else{

this.number=num;

}

isNumber=true;/*輸入連續(xù)數(shù)字（即多位數(shù)字）時為真*/

}?

public void operationProcess(char operator){/*根據(jù)輸入的操作符改變當(dāng)前操作符*/

switch(operator){

case '-':

this.operator='-';

break;

case '+':

this.operator='+';

break;

case '*':

this.operator='*';

break;

case '/':

this.operator='/';

break;

}

result=number;

isNumber=false;/*輸入操作符時表示輸入連續(xù)數(shù)字的標(biāo)記變量為假*/

}?

public void clear(){

number=0;

result=0;

}??

public void equal(){/*計算運算結(jié)果*/

switch(operator){

case '-':

result=result-number;

break;

case '+':

result=result+number;

break;

case '*':

result=result*number;

break;

case '/':

result=result/number;

break;

case ' ':

result=number;

break;

}

number=result; /*把運算結(jié)果賦值給顯示變量*/

isNumber=false;

operator=' ';?

}?

public static void main(String args[]){

Calculator cal=new Calculator();/*創(chuàng)建計算器*/

}

public void actionPerformed(ActionEvent e){

String command=e.getActionCommand();/*獲取按鈕激發(fā)的操作事件的命令名稱*/

char c=command.charAt(0);/*將按鈕命令名稱的第一個字符賦值給一個字符c*/

switch(c){

case '1':

case '2':

case '3':

case '4':

case '5':

case '6':

case '7':

case '8':

case '9':

case '0':

int number=Integer.parseInt(command);

numberProcess(number);/*輸入數(shù)字的處理*/

break;

case '+':

case '-':

case '*':

case '/':

operationProcess(c);/*算數(shù)運算符的處理*/

break;

case '=':equal();break;/*計算運算結(jié)果*/

case 'C':clear();break;/*清零*/

}

reDisplay(); /*在文本域中顯示信息*/

}

}

運行截圖：

求一個java applet小程序的源代碼

import?java.applet.Applet;

import?java.awt.Button;

import?java.awt.Color;

import?java.awt.Graphics;

import?java.awt.TextField;

import?java.awt.event.ActionEvent;

public?class?Nicki?extends?Applet{

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

private?Button?ok;

private?int?num=32;

private?int?resu=0;

private?boolean?isRig=false;

private?TextField?iPut;

public?Nicki(){

this.setLayout(null);

ok=new?Button("OK");

ok.setActionCommand(getName());

ok.setBounds(150,?150,?40,?20);

iPut=new?TextField();

this.add(iPut);

iPut.setBounds(100,?150,?40,?20);

this.add(ok);

ok.addActionListener(new?ButtonAction(this));

}

public?void?paint(Graphics?g){

g.setColor(Color.white);

g.fillRect(0,?0,?this.getWidth(),?this.getHeight());

g.setColor(Color.BLACK);

g.drawString("Please?guess?a?number?",?10,?20);

g.drawString("between?1?and?100",?10,?40);

if(isRig==falseresu!=0){

if(resunum){

g.drawString(""+resu+"?is?too?big?!",?10,?100);

}else?if(resunum){

g.drawString(resu+"is?too?small?!",?10,?100);

}

}else?if(isRig==true){

g.setColor(Color.GREEN);

g.drawString("Yes,"+resu+"?is?the?right?number",?10,?80);

g.drawString("Your?are?great!?",?10,?100);

g.setColor(Color.red);

g.drawString(resu+"!",?70,?120);

}

iPut.setText("");

g.drawString("Input?the?number：",?0,?150);

}

public?void?ButtonActionPerformed(ActionEvent?e){

if(e.getActionCommand().equals("panel0")){

resu=Integer.parseInt(iPut.getText());

if(num==resu){

isRig=true;

}else{

isRig=false;

}

repaint();

}

}

}

class?ButtonAction?implements?java.awt.event.ActionListener{

Nicki?su;

public?ButtonAction(Nicki?bun){

this.su=bun;

}

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

su.ButtonActionPerformed(e);

}

}

標(biāo)題名稱：java圖形小程序源代碼 java簡單圖形代碼
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