Question

怎样用java编写图形界面的Application程序

包括分别用于输入字符串和浮点数的两个TextField,以及两个按钮（一个是“输入”按钮，一个是“输出”按钮）和一个TextArea。用户在两个TextField中输入数据并单击“输入”按钮后，程序把这两个数据保存入一个文件file.dat中，单击“确定”按钮，则把这个文件的内容显示在TextArea中。

Answer 1

java编写图形界面需要用到swing等组件，可以在eclipse中安装windowbuilder来开发窗体，自动生成窗体代码，然后自己再根据需要修改，如：

package mainFrame;

import java.awt.EventQueue;

import java.awt.event.MouseAdapter;

import java.awt.event.MouseEvent;

import javax.swing.ImageIcon;

import javax.swing.JButton;

import javax.swing.JCheckBox;

import javax.swing.JFrame;

import javax.swing.JLabel;

import javax.swing.JPanel;

import javax.swing.JPasswordField;

import javax.swing.JTextField;

import javax.swing.SwingConstants;

import javax.swing.UIManager;

import javax.swing.UnsupportedLookAndFeelException;

import javax.swing.border.EmptyBorder;

public class Mian_login extends JFrame {

private JPanel contentPane;

private JTextField text_LoginName;

private JPasswordField Login_password;

/**

* Launch the application.

*/

public static void main(String[] args) {

EventQueue.invokeLater(new Runnable() {

@Override

public void run() {

try {

Mian_login frame = new Mian_login();

frame.setVisible(true);

} catch (Exception e) {

e.printStackTrace();

}

}

});

}

/**

* Create the frame.

*/

public Mian_login() {

setDefaultCloseOperation(JFrame.EXIT_ON_CLOSE);

setBounds(500, 200, 443, 300);

setResizable(false);

setTitle("登 录");

/*获取系统按钮样式*/

String lookAndFeel = UIManager.getSystemLookAndFeelClassName();

try {

UIManager.setLookAndFeel(lookAndFeel);

} catch (ClassNotFoundException e1) {

e1.printStackTrace();

} catch (InstantiationException e1) {

e1.printStackTrace();

} catch (IllegalAccessException e1) {

e1.printStackTrace();

} catch (UnsupportedLookAndFeelException e1) {

e1.printStackTrace();

}

contentPane = new JPanel();

contentPane.setBorder(new EmptyBorder(5, 5, 5, 5));

setContentPane(contentPane);

contentPane.setLayout(null);

JPanel panel = new JPanel();

panel.setOpaque(false);

panel.setBounds(0, 0, 434, 272);

contentPane.add(panel);

panel.setLayout(null);

JButton btn_Login = new JButton("\u767B\u5F55");

btn_Login.addMouseListener(new MouseAdapter() {

@Override

public void mouseClicked(MouseEvent e) {

}

});

btn_Login.setBounds(88, 195, 70, 23);

panel.add(btn_Login);

JButton btn_cancel = new JButton("\u53D6\u6D88");

btn_cancel.addMouseListener(new MouseAdapter() {

@Override

public void mouseClicked(MouseEvent e) {

dispose();

}

});

btn_cancel.setBounds(268, 195, 70, 23);

panel.add(btn_cancel);

JLabel lblNewLabel_name = new JLabel("\u7528\u6237\u540D");

lblNewLabel_name.setHorizontalAlignment(SwingConstants.CENTER);

lblNewLabel_name.setOpaque(true);

lblNewLabel_name.setBounds(88, 48, 70, 23);

panel.add(lblNewLabel_name);

JLabel lblNewLabel_passwd = new JLabel("\u5BC6\u7801");

lblNewLabel_passwd.setHorizontalAlignment(SwingConstants.CENTER);

lblNewLabel_passwd.setOpaque(true);

lblNewLabel_passwd.setBounds(88, 102, 70, 23);

panel.add(lblNewLabel_passwd);

JCheckBox chckbx_remember = new JCheckBox("\u8BB0\u4F4F\u5BC6\u7801");

chckbx_remember.setBounds(102, 150, 84, 23);

panel.add(chckbx_remember);

text_LoginName = new JTextField();

text_LoginName.setBounds(182, 48, 156, 23);

panel.add(text_LoginName);

text_LoginName.setColumns(10);

Login_password = new JPasswordField();

Login_password.setBounds(182, 102, 156, 23);

panel.add(Login_password);

JCheckBox chckbx_AutoLogin = new JCheckBox("\u81EA\u52A8\u767B\u5F55");

chckbx_AutoLogin.setBounds(233, 150, 84, 23);

panel.add(chckbx_AutoLogin);

JLabel Label_background = new JLabel("");

Label_background.setIcon(new ImageIcon("E:\\JAVA_workplace\\0002-\u754C\u9762\u8BBE\u8BA1\\images\\background3.jpg"));

Label_background.setBounds(0, 0, 437, 272);

contentPane.add(Label_background);

}

}

Answer 2

package lea;

import java.awt.*;
import java.awt.event.*;
import java.io.*;

public class liangeran extends Frame implements ActionListener{

/**
* @param args
*/
TextField stringText;
TextField floatText;

TextArea textArea;

Button inputButton;
Button outputButton;

byte bytes[]=new byte[65560];

public liangeran(){
setTitle("实现文本框的存取");
setSize(380,380);
setVisible(true);
setLayout(new FlowLayout());
setResizable(false);

setTextField();
setButton();
setTextArea();

addWindowListener(new WindowAdapter() {
public void windowClosing(WindowEvent e) {
System.exit(0);
}
});

validate();
}

private void setTextArea() {
textArea=new TextArea(15,45);
add(textArea);
}

private void setButton() {
inputButton=new Button("输入");
outputButton=new Button("输出");

inputButton.addActionListener(this);
outputButton.addActionListener(this);

add(inputButton);
add(outputButton);
}

private void setTextField() {
stringText=new TextField("请输入字符串：",45);
floatText=new TextField("请输入浮点型数字：",45);

add(stringText);
add(floatText);

}

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

public void actionPerformed(ActionEvent e) {
File myFile=new File("file.dat");
if(e.getSource()==inputButton){
String allText=stringText.getText()+"\n"+floatText.getText();
try{

FileOutputStream fileout=new FileOutputStream(myFile);
bytes=allText.getBytes();
fileout.write(bytes, 0, bytes.length);
}
catch(Exception exception){
System.out.println(exception.getMessage());
}
}
if(e.getSource()==outputButton){
try{
textArea.append(new String(bytes));

}
catch(Exception exception){
System.out.println(exception.getMessage());
}
}
}

}

注:这是从我同学那里的得到的源代码咯！

Answer 3

用netbeanszuo界面就行，那个和vb一样，组件都是现成的，直接用鼠标托到框架里界面就有了，你所要做的只是填参数和写事件处理。

Answer 4

java编写图形界面需要用到swing等组件，可以在eclipse中安装windowbuilder来开发窗体，自动生成窗体代码，然后自己再根据需要修改，如：

package mainFrame;

import java.awt.EventQueue;

import java.awt.event.MouseAdapter;

import java.awt.event.MouseEvent;

import javax.swing.ImageIcon;

import javax.swing.JButton;

import javax.swing.JCheckBox;

import javax.swing.JFrame。

Java是一门面向对象编程语言，不仅吸收了C++语言的各种优点，还摒弃了C++里难以理解的多继承、指针等概念，因此Java语言具有功能强大和简单易用两个特征。Java语言作为静态面向对象编程语言的代表，极好地实现了面向对象理论，允许程序员以优雅的思维方式进行复杂的编程。

Answer 5

采用applet，在这里不可能把程序全部贴出来，楼主若需要可联系偶