JAVA代码添加背景图片。更改背景颜色！awt或swing！很简单！越简单越好！
就是个背景图片，别太复杂！图我自己PS放在该文件夹下，名为TEST.JPG
import java.awt.*;
import java.awt.event.*;
import javax.swing.*;
public class Manager{
JFrame mainFrame; //主框架
public StudentManager(){
mainFrame=new JFrame("管理系统");
//创建菜单栏JMenuBar
JMenuBar menuBar=new JMenuBar();
//创建菜单JMenu
JMenu menu=new JMenu("菜单选项");
//创建菜单项目JMenuItem
JMenuItem input=new JMenuItem("录入对象信息");
input.addActionListener(new MenuHandler());
JMenuItem modify=new JMenuItem("修改对象信息");
modify.addActionListener(new MenuHandler());
//把菜单项目JMenuItem添加到菜单JMenu当中
menu.add(input);
menu.add(modify);
//把菜单JMenu添加到菜单栏JMenuBar当中
menuBar.add(menu);
//把菜单栏JMenuBar添加到框架上
mainFrame.setJMenuBar(menuBar);
//创建标签
JLabel myLabel=new JLabel("管理系统");
myLabel.setForeground(Color.red);
myLabel.setSize(50,5);
JPanel pan=new JPanel();
pan.add(myLabel);
//把标签所在的容器设置为框架的内容面板
mainFrame.setContentPane(pan);
mainFrame.setSize(500,500);
mainFrame.setVisible(true);
//关闭框架的处理
mainFrame.setDefaultCloseOperation(JFrame.EXIT_ON_CLOSE);
}
class MenuHandler implements ActionListener{
public void actionPerformed(ActionEvent e){
if(e.getActionCommand().equals("录入对象信息"))
{
new Input(); //如果是录入信息，则产生录入窗口
}
if(e.getActionCommand().equals("查询对象信息"))
{
new Inquest(); //如果是查询信息，则产生查询窗口
}
}
}
public static void main(String args[]){
new StudentManager();
}
}
回答不下可以把背景颜色回答在http://zhidao.baidu.com/question/82190839.html 展开
设置颜色：
把pan - pan6的Background设为Null，这样他们就变为透明的了，以后只需要改变inquestFrame的颜色就可以改变全部的颜色，代码如下：
// 设置整体布局
JPanel pan = new JPanel();
蔽枯喊pan.setLayout(new GridLayout(6, 1));
pan.add(pan1);
pan.add(pan2);
pan.add(pan3);
pan.add(pan4);
pan.add(pan5);
pan.add(pan6);
pan.setBackground(null);
pan1.setBackground(null);
pan2.setBackground(null);
pan3.setBackground(null);
pan4.setBackground(null);
pan5.setBackground(null);
pan6.setBackground(null);
r1.setBackground(null);
r2.setBackground(null);
inquestFrame.setBackground(Color.LIGHT_GRAY);
inquestFrame.setContentPane(pan);
inquestFrame.setSize(300, 250);
inquestFrame.setVisible(true);
设置图片需要改的比较多，自己比较那不一样吧：
import java.awt.Graphics;
import java.awt.GridLayout;
import java.awt.event.ActionEvent;
import java.awt.event.ActionListener;
import java.net.URL;
import javax.swing.ButtonGroup;
import javax.swing.ImageIcon;
import javax.swing.JButton;
import javax.swing.JFrame;
import javax.swing.JLabel;
import javax.swing.JPanel;
import javax.swing.JRadioButton;
import javax.swing.JTextField;
public class Inquest {
JFrame inquestFrame;
JLabel lab1, lab2, lab3, lab4, lab5, lab6;
JTextField text1, text2, text4, text5, text6;
JRadioButton r1, r2;
JButton inqButton;
public Inquest() {
inquestFrame = new JFrame("教育经历管理系统-查询窗口");
MyPanel pan1 = new MyPanel();
lab1 = new JLabel("请输入编码:");
text1 = new JTextField(10);
inqButton = new JButton(" 查询");
inqButton.addActionListener(new ButtonHandler());
pan1.add(lab1);
pan1.add(text1);
pan1.add(inqButton);
MyPanel pan2 = new MyPanel();
lab2 = new JLabel("姓名:");
text2 = new JTextField(10);
pan2.add(lab2);
pan2.add(text2);
MyPanel pan3 = new 宏野MyPanel();
lab3 = new JLabel("性别:");
r1 = new JRadioButton("男");
r2 = new JRadioButton("女败银");
// 把两个单选按钮放到一个群组中，保持二选一
ButtonGroup group = new ButtonGroup();
group.add(r1);
group.add(r2);
pan3.add(lab3);
pan3.add(r1);
pan3.add(r2);
MyPanel pan4 = new MyPanel();
lab4 = new JLabel("单位:");
text4 = new JTextField(10);
pan4.add(lab4);
pan4.add(text4);
MyPanel pan5 = new MyPanel();
lab5 = new JLabel("职位:");
text5 = new JTextField(10);
pan5.add(lab5);
pan5.add(text5);
MyPanel pan6 = new MyPanel();
lab6 = new JLabel("年龄:");
text6 = new JTextField(10);
pan6.add(lab6);
pan6.add(text6);
// 设置整体布局
MyPanel pan = new MyPanel();
pan.setLayout(new GridLayout(6, 1));
pan.add(pan1);
pan.add(pan2);
pan.add(pan3);
pan.add(pan4);
pan.add(pan5);
pan.add(pan6);
pan.setBackground(null);
pan1.setBackground(null);
pan2.setBackground(null);
pan3.setBackground(null);
pan4.setBackground(null);
pan5.setBackground(null);
pan6.setBackground(null);
r1.setBackground(null);
r2.setBackground(null);
MyPanel pan0 = new MyPanel();
pan0.setPreferredSize(pan.getPreferredSize());
pan0.setLayout(null);
pan.setBounds(0, 0, pan.getPreferredSize().width, pan.getPreferredSize().height);
URL url = Inquest.class.getResource("Winter.jpg");
ImageIcon img = new ImageIcon(url);
JLabel lab = new JLabel(img);
lab.setBounds(0, 0, img.getIconWidth(), img.getIconHeight());
pan0.add(pan);
pan0.add(lab);
inquestFrame.setContentPane(pan0);
inquestFrame.pack();
inquestFrame.setVisible(true);
}
public static class MyPanel extends JPanel {
public void paint(Graphics g) {
paintChildren(g);
}
}
public void setBack() {
((JPanel) inquestFrame.getContentPane()).setOpaque(false);
// Winter.jpg这个图片的位置要跟当前这个类是同一个包下
URL url = Inquest.class.getResource("Winter.jpg");
ImageIcon img = new ImageIcon(url);
JLabel background = new JLabel(img);
inquestFrame.getLayeredPane().add(background, new Integer(Integer.MIN_VALUE));
background.setBounds(0, 0, img.getIconWidth(), img.getIconHeight());
}
class ButtonHandler implements ActionListener {
public void actionPerformed(ActionEvent e) {
// 生成SQL语句
String s = "select * from information where id=" + "'" + text1.getText() + "'";
String driver = "sun.jdbc.odbc.JdbcOdbcDriver";
String url = "jdbc:odbc:test";
// DB db = new DB(driver, url, "sa", "");
// ResultSet rs = db.query(s);
// try {
// while (rs.next()) {
// text2.setText(rs.getString(2));
// String sex = rs.getString(3);
// if (sex.trim().equals("男"))
// r1.setSelected(true);
// else
// r2.setSelected(true);
//
// text4.setText(rs.getString(4));
// text5.setText(rs.getString(5));
// text6.setText(rs.getString(6));
// }
// } catch (Exception e2) {
// e2.printStackTrace();
// }
}
}
public static void main(String args[]) {
new Inquest();
}
}
