javagui編程實例

㈠ 編寫一個java GUI

試一下下面的代碼
（如果點擊按鈕後沒有任何變化，將窗口最小化一下就有了）
沒有出現這個問題的話，也請告訴我一下~
import java.awt.*;
import java.awt.event.*;
import javax.swing.*;
import java.util.*;
public class painting extends JFrame implements ActionListener{
private JButton round,rectangle,ellipse,beeline;
private JLabel xaxis,yaxis,remain,information;
private JTextField xTF,yTF;
private BorderLayout layout;
private Container cp;
private JPanel pCenter;
Vector<Object> v=new Vector<Object>(); //定義一個集合類用於存儲按鈕對象

public painting(){ //構造方法 ------------------框架初始化-------------------
setDefaultCloseOperation(JFrame.EXIT_ON_CLOSE);
setTitle("painting");
setSize(400,500);
layout = new BorderLayout();
cp = getContentPane();
cp.setLayout(layout);

round= new JButton("畫圓");
rectangle= new JButton("畫矩形");
ellipse= new JButton("畫橢圓");
beeline= new JButton("畫直線");
xaxis=new JLabel("x坐標");
yaxis=new JLabel("y坐標");
remain=new JLabel("右下角坐標(400,500) ");
xTF=new JTextField("0",5);
yTF=new JTextField("0",5);

JPanel pUp= new JPanel();//第一個面板 在上部
pUp.add(remain);
pUp.add(xaxis);//置兩個文本框
pUp.add(xTF);
pUp.add(yaxis);
pUp.add(yTF);
cp.add(pUp, "North");
//pCenter=new JPanel();//第二個面板 在中部
//pCenter.add(information);//置顯示說明與畫圖區
//cp.add(pCenter,"Center");
JPanel pDown= new JPanel();//第三個面板 在下部
pDown.add(round);// 置四個按鈕
pDown.add(rectangle);
pDown.add(ellipse);
pDown.add(beeline);
cp.add(pDown, "South");

round.addActionListener(this); //置按鈕監聽--------------按鈕行為監聽與響應-------------
rectangle.addActionListener(this);
ellipse.addActionListener(this);
beeline.addActionListener(this);
}

public void actionPerformed(ActionEvent e) {//監聽響應
v.add(e.getSource());//將按鈕情況存入v中
}

public void paint(Graphics g) { //--------------繪圖響應-------------
super.paint(g);
int xx=Integer.parseInt(xTF.getText());//獲取位置值
int yy=Integer.parseInt(yTF.getText());
int size=0;
Object o;
//while(v.size()!=size){//當用戶點擊按鈕選擇某一種圖形時，v的大小就會比size值大1，當繪圖完成後，v.size又等於size；效果就是：出現點擊 即刻處理
o=v.lastElement();
if(o == round) {g.drawOval(xx,yy,50,50);}
else if (o == rectangle){g.drawRect(xx,yy,100,50);}
else if (o == ellipse) {g.drawOval(xx,yy,100,50);}
else if(o == beeline) {g.drawLine(xx,yy,xx+100,yy);}
size++;
}
}

public static void main(String[] args){ // ------------程序入口-------------
JFrame frame = new painting();
frame.setVisible(true);
}

}

㈡ java 用GUI寫一個程序

使用Font類
下邊是例子

---------------------------------------------------------------------------------------------
import java.awt.Font;

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

public class FontApp extends JFrame {

public FontApp() {

on(EXIT_ON_CLOSE);
setSize(400, 300);
setLocationRelativeTo(null);
setResizable(false);
getContentPane().setLayout(null);

JLabel lblNewLabel = new JLabel("a String size 18");
lblNewLabel.setFont(new Font(null, Font.ITALIC, 18));
lblNewLabel.setBounds(12, 30, 232, 29);
getContentPane().add(lblNewLabel);

JLabel lblNewLabel_1 = new JLabel("b String size 14");
lblNewLabel_1.setFont(new Font(null, Font.BOLD, 14));
lblNewLabel_1.setBounds(12, 97, 232, 29);
getContentPane().add(lblNewLabel_1);
setVisible(true);
}

public static void main(String[] args) {
new FontApp();
}
}

㈢ 使用Java的GUI圖形用戶界面編程設計並編寫一個計算器程序

import java.awt.BorderLayout;
import java.awt.GridLayout;
import java.awt.event.ActionEvent;
import java.awt.event.ActionListener;
import javax.swing.JButton;
import javax.swing.JFrame;
import javax.swing.JPanel;
import javax.swing.JTextField;
public class Calculator extends JFrame {
JButton b0 = new JButton("0");
JButton b1 = new JButton("1");
JButton b2 = new JButton("2");
JButton b3 = new JButton("3");
JButton b4 = new JButton("4");
JButton b5 = new JButton("5");
JButton b6 = new JButton("6");
JButton b7 = new JButton("7");
JButton b8 = new JButton("8");
JButton b9 = new JButton("9");
JButton jiaButton = new JButton("+");
JButton jianButton = new JButton("-");
JButton chengButton = new JButton("*");
JButton chuButton = new JButton("/");
JButton yuButton = new JButton("%");
JButton jjButton = new JButton("+/-");
JButton sqrtButton = new JButton("sqrt");
JButton dianButton = new JButton(".");
JButton dengButton = new JButton("=");
JButton Button = new JButton("1/x");
JButton backButton = new JButton("Backpace");
JButton cButton = new JButton("C");
public double op1;
public double op2;
public static final int JIA = 0;
public static final int JIAN = 1;
public static final int CHENG = 2;
public static final int CHU = 3;
public static final int JJ = 4;
public static final int DIAN = 5;
public int current0p = 0;
private boolean opEnd = false;

JPanel panel1 = new JPanel();
JPanel panel2 = new JPanel();
JPanel panel3 = new JPanel();
JPanel panel4 = new JPanel();
JTextField result = new JTextField(20);

public Calculator() {
initPanel2();
initPanel3();
panel2.setLayout(new GridLayout(5, 4));
panel1.setLayout(new BorderLayout());
panel1.add(panel3, BorderLayout.NORTH);// 設置位置
panel1.add(panel2, BorderLayout.CENTER);// 設置位置
getContentPane().add(panel1);
addActionListeners();
setSize(260, 260);
setLocation(500, 300);
setVisible(true);
setDefaultCloseOperation(Calculator.EXIT_ON_CLOSE);
this.setResizable(false);
this.setTitle("計算器");
}
private void initPanel2() {
// 把組件添加相應panel上

panel2.add(b7);
panel2.add(b8);
panel2.add(b9);
panel2.add(chuButton);

panel2.add(b4);
panel2.add(b5);
panel2.add(b6);
panel2.add(chengButton);

panel2.add(b1);
panel2.add(b2);
panel2.add(b3);
panel2.add(jianButton);

panel2.add(b0);
panel2.add(jjButton);
panel2.add(dianButton);
panel2.add(jiaButton);

panel2.add(Button);
panel2.add(yuButton);
panel2.add(sqrtButton);
panel2.add(dengButton);

}

private void addActionListeners() {
ActionHandler c = new ActionHandler();
b0.addActionListener(c);
b1.addActionListener(c);
b2.addActionListener(c);
b3.addActionListener(c);
b4.addActionListener(c);
b5.addActionListener(c);
b6.addActionListener(c);
b7.addActionListener(c);
b8.addActionListener(c);
b9.addActionListener(c);

jiaButton.addActionListener(c);
dengButton.addActionListener(c);
chengButton.addActionListener(c);
chuButton.addActionListener(c);
jianButton.addActionListener(c);
jjButton.addActionListener(c);
dianButton.addActionListener(c);
sqrtButton.addActionListener(c);
yuButton.addActionListener(c);
Button.addActionListener(c);
backButton.addActionListener(c);
cButton.addActionListener(c);
}

class ActionHandler implements ActionListener {
public void actionPerformed(ActionEvent e) {

if (e.getSource() == b0) {
if (opEnd == false) {
result.setText("");

}
result.setText(result.getText() + "0");

}
if (e.getSource() == b1) {
if (opEnd == false) {
result.setText("");

}
result.setText(result.getText() + "1");
opEnd = true;
}

if (e.getSource() == b2) {

if (opEnd == false) {
result.setText("");

}
result.setText(result.getText() + "2");
opEnd = true;
}
if (e.getSource() == b3) {
if (opEnd == false) {
result.setText("");

}
result.setText(result.getText() + "3");
opEnd = true;

}
if (e.getSource() == b4) {
if (opEnd == false) {
result.setText("");

}
result.setText(result.getText() + "4");
opEnd = true;
}
if (e.getSource() == b5) {

if (opEnd == false) {
result.setText("");

}
result.setText(result.getText() + "5");
opEnd = true;
}
if (e.getSource() == b6) {
if (opEnd == false) {
result.setText("");

}
result.setText(result.getText() + "6");
opEnd = true;
}
if (e.getSource() == b7) {
if (opEnd == false) {
result.setText("");

}
result.setText(result.getText() + "7");
opEnd = true;
}
if (e.getSource() == b8) {
if (opEnd == false) {
result.setText("");

}
result.setText(result.getText() + "8");
opEnd = true;
}
if (e.getSource() == b9) {
if (opEnd == false) {
result.setText("");

}
result.setText(result.getText() + "9");
opEnd = true;
}
try {
if (e.getSource() == jiaButton) {
op1 = Double.parseDouble(result.getText());

// 2、說明操作數已經輸入完畢
opEnd = false;

current0p = JIA;
}
if (e.getSource() == chengButton) {
op1 = Double.parseDouble(result.getText());

// 2、說明操作數已經輸入完畢
opEnd = false;

current0p = CHENG;

}
if (e.getSource() == chuButton) {
op1 = Double.parseDouble(result.getText());

// 2、說明操作數已經輸入完畢
opEnd = false;

current0p = CHU;

}
if (e.getSource() == jianButton) {
op1 = Double.parseDouble(result.getText());

// 2、說明操作數已經輸入完畢
opEnd = false;

current0p = JIAN;

}

if (e.getSource() == jjButton) {
String tmp = result.getText();
if (tmp.equals("") || tmp.equals("0")) {
return;
}
if (tmp.charAt(0) == '-') {
tmp = tmp.substring(1);

} else {
tmp = '-' + tmp;
}
result.setText(tmp);
}
if (e.getSource() == dianButton) {
String tmp = result.getText();
if (tmp.equals("")) {
return;
}
if (tmp.indexOf(".") != -1) {
return;
}
tmp = tmp + ".";
result.setText(tmp);

}
if (e.getSource() == sqrtButton) {
String tmp = result.getText();
if (tmp.equals(" ")) {
return;
}
double d;
d = Double.parseDouble(tmp);// 先定義double類型d
if (d < 0) {
result.setText("不能對負數求平方根");
return;
}
op2 = Math.sqrt(d);
result.setText(op2 + "");
}

if (e.getSource() == backButton) {
String s = result.getText();
result.setText("");
for (int i = 0; i < s.length() - 1; i++) {
char a = s.charAt(i);
result.setText(result.getText() + a);
}

}
if (e.getSource() == cButton) {
result.setText("0");
opEnd = false;
}
if (e.getSource() == dengButton) {
op2 = Double.parseDouble(result.getText());

switch (current0p) {
case JIA:
result.setText(op1 + op2 + "");
break;
case JIAN:
result.setText(op1 - op2 + "");
break;
case CHENG:
result.setText(op1 * op2 + "");
break;
case CHU:
if (op2 == 0) {
result.setText("被除數不能為零");
break;
}
result.setText(op1 / op2 + "");
break;
}
opEnd = false;
}
} catch (Exception e1) {
result.setText("Wrong");
opEnd = false;
}
}

}

private void initPanel3() {

panel3.setLayout(new GridLayout(2, 1));
panel3.add(result);
panel3.add(panel4);
panel4.setLayout(new GridLayout(1, 2));

panel4.add(backButton);
panel4.add(cButton);
// panel3.setPreferredSize(new Dimension(260,65));
}

public static void main(String[] args) {
Calculator c = new Calculator();// 生成類實例

}

}

㈣ java編程中，GUI界面的一般框架有什麼希望大神給寫個程序實例，程序內容包括布局的應用，多個

java GUI一般,通過AWT,SWING 實現

其餘比較流行的是SWT,但是它不是官方庫, 並且不能跨平台

//注意:

Swing, 所以很多不涉及界面組件的一些類比如布局 等Swing也可以使用

但是組件,最好不要混用, 容易出現一些組件疊加,等顯示錯誤 比如JButton TextField等混用

//參考代碼

下面使用Swing組件來實現

importjava.awt.*;
importjava.awt.event.*;
importjavax.swing.*;

//本類實現了ActionListener介面.一個ActionListener可以響應JMenuItem和JButton的動作
//本類實現FocusListener介面,一個FocusListener可以響應JTextField,JButton等
//JButton響應多個事件介面
,FocusListener{
	privateJTextFieldjtf1;
	privateJTextFieldjtf2;
	privateJTextFieldjtf3;
	privateJButtonjb1;
	
	publicMyGuiFrame(){
		//----------窗口屬性的設置----------
		setTitle("窗口應用程序");//窗口標題
		setSize(380,120);//窗口大小
		setLocationRelativeTo(null);//窗口居於屏幕中央
		setDefaultCloseOperation(EXIT_ON_CLOSE);//點擊關閉窗口後退出jvm虛擬機
		getContentPane().setLayout(newBorderLayout(5,3));//邊界布局,水平間距5,垂直間距3

		//菜單欄組件初始化
		initMenu();

		//主要面板的初始化
		initPanel();
	}

	privatevoidinitPanel(){
		JPaneljp=newJPanel(newFlowLayout(FlowLayout.CENTER));//流式布局
		jtf1=newJTextField(8);
		jtf1.addFocusListener(this);//添加焦點響應
		JLabeljl=newJLabel("+");
		jtf2=newJTextField(8);
		jtf2.addFocusListener(this);
		jb1=newJButton("=");
		jb1.addActionListener(this);//添加動作響應
		jb1.addFocusListener(this);//添加焦點響應

		jtf3=newJTextField(8);
		jtf3.setEditable(false);

		jp.add(jtf1);
		jp.add(jl);
		jp.add(jtf2);
		jp.add(jb1);
		jp.add(jtf3);
		getContentPane().add(jp,BorderLayout.CENTER);

	}

	privatevoidinitMenu(){//菜單欄的初始化和設置
		JMenuBarjmb=newJMenuBar();
		JMenujm1=newJMenu("系統");
		JMenuItemjmi101=newJMenuItem("退出");
		jmi101.addActionListener(this);//添加動作響應
		JMenujm2=newJMenu("幫助");
		JMenuItemjmi201=newJMenuItem("功能說明");
		jmi201.addActionListener(this);
		jm1.add(jmi101);
		jm2.add(jmi201);
		jmb.add(jm1);
		jmb.add(jm2);
		setJMenuBar(jmb);//設置菜單欄
	}

	//main方法,創建對象窗口,並且設置可見
	publicstaticvoidmain(String[]args){
		newMyGuiFrame().setVisible(true);
	}

	//動作響應處理
	publicvoidactionPerformed(ActionEvente){
		Stringcmd=e.getActionCommand();//根據命令來區分不同的操作
		if(cmd.equals("退出")){
			System.exit(0);
		}
		if(cmd.equals("功能說明")){
			JOptionPane.showMessageDialog(this,"加法");
		}
		if(cmd.equals("=")){
			
			Strings1=jtf1.getText().trim();
			Strings2=jtf2.getText().trim();
			if(s1.equals("")){
				s1="0";
			}
			if(s2.equals("")){
				s2="0";
			}
			doublenum1=Double.parseDouble(s1);//從字元串轉小數
			doublenum2=Double.parseDouble(s2);
			jtf3.setText((num1+num2)+"");//數字類型轉字元串類型

		}
	}

	//焦點響應處理
	publicvoidfocusGained(FocusEvente){//獲得焦點
		JComponentcmp=(JComponent)e.getComponent();//根據事件來源組件來區分不同的操作
		if(cmp==jtf1||cmp==jtf2){
			cmp.setBorder(BorderFactory.createLineBorder(Color.BLUE));//設置邊框
		}
		if(cmp==jb1){
			jb1.setForeground(Color.RED);//設置文字顏色
		}
	}

	publicvoidfocusLost(FocusEvente){//失去焦點
		JComponentcmp=(JComponent)e.getComponent();
		if(cmp==jtf1||cmp==jtf2){
			cmp.setBorder(BorderFactory.createLineBorder(Color.GRAY));
		}
		if(cmp==jb1){
			jb1.setForeground(Color.BLACK);
		}
	}

}

運行效果如圖

㈤ 用java編程實現GUI界面，包括文本域、文本框、按鈕等相關功能，實現模擬登陸驗證功能。

importjava.awt.FlowLayout;
importjava.awt.event.ActionEvent;
importjava.awt.event.ActionListener;
importjavax.swing.JButton;
importjavax.swing.JFrame;
importjavax.swing.JLabel;
importjavax.swing.JTextArea;
importjavax.swing.JTextField;

publicclassDemoextendsJFrame{

Stringusername;
Stringpassword;
publicDemo(){
username="java";
password="123";

setTitle("#####");
setSize(400,300);
setLocation(400,200);
setLayout(newFlowLayout());

JTextAreajta=newJTextArea(4,30);
jta.setText("請輸入用戶名密碼：
用戶名："+username+"
密碼："+password);
jta.setEditable(false);//設置文本區域不可編輯
add(jta);

JLabelusernameLabel=newJLabel("用戶名：");
finalJTextFielsernameText=newJTextField(10);
add(usernameLabel);
add(usernameText);

JLabelpasswordLabel=newJLabel("密碼：");
finalJTextFieldpasswordText=newJTextField(10);
add(passwordLabel);
add(passwordText);

JButtonbutton=newJButton("登錄");
add(button);

finalJLabelresult=newJLabel();//用來顯示登錄結果
add(result);

button.addActionListener(newActionListener(){//登錄按鈕事件

@Override
publicvoidactionPerformed(ActionEvente){
//獲取輸入的用戶名密碼
StringtempUserName=usernameText.getText();
StringtempPassWord=passwordText.getText();

if(tempUserName.equals(username)&&tempPassWord.equals(password)){
result.setText("登錄成功");
}else{
result.setText("登錄失敗");
}
}
});

setDefaultCloseOperation(JFrame.EXIT_ON_CLOSE);
setVisible(true);
}

publicstaticvoidmain(String[]args){
newDemo();
}
}