请问repaint函数的摆放位置? 有个APPLICATION要求是点击菜单中的选项面板上立刻出现文字,但你我现在做到的是要最大化最小化后才能出现相应文字,听说是repaint函数的问题,不知道应该放在哪里。谢谢了 解决方案 » 免费领取超大流量手机卡,每月29元包185G流量+100分钟通话, 中国电信官方发货 repaint放在函数点击菜单中的选项面板上的事件里 ActionListener 类似里比较好, import java.awt.*;import java.awt.event.*;public class PeopleManagement extends Frame implements ActionListener, WindowListener { // insert,update,quit private MenuItem zhuce = new MenuItem("注册"); private MenuItem denglu=new MenuItem("登录"); private MenuItem gengxin = new MenuItem("更新"); private MenuItem zhuxiao = new MenuItem("注销"); private MenuItem tuichu = new MenuItem("退出"); // assess the performance of an employee formally private MenuItem gongzi = new MenuItem("评定工资"); private MenuItem jintie = new MenuItem("评定津贴"); // checkout personal info private MenuItem renming = new MenuItem("人名"); private MenuItem zhicheng = new MenuItem("职称"); // statistics private MenuItem tongj = new MenuItem("按类别统计详情"); // version private MenuItem banben = new MenuItem("版本"); // panel private Panel panel1 = new Panel(); private Panel panel2 = new Panel(); private Panel panel3 = new Panel(); private Panel panel4 = new Panel(); Update update= new Update(); NewUser newuser = new NewUser(); Statistics stat = new Statistics(); Login lg = new Login(); // constructor public PeopleManagement() { super("人事管理系统"); // menubar setting Menu file = new Menu("登录"); file.add(zhuce); zhuce.setEnabled(true); file.add(denglu); denglu.setEnabled(true); file.add(gengxin); gengxin.setEnabled(true); file.add(zhuxiao); zhuxiao.setEnabled(true); file.addSeparator(); file.add(tuichu); tuichu.setEnabled(true); Menu assess = new Menu("业绩评估"); assess.add(gongzi); gongzi.setEnabled(true); assess.add(jintie); jintie.setEnabled(true); Menu checkout = new Menu("人事查询"); checkout.add(renming); renming.setEnabled(true); checkout.add(zhicheng); zhicheng.setEnabled(true); Menu statistics = new Menu("统计报表"); statistics.add(tongj); tongj.setEnabled(true); Menu help = new Menu("帮助"); help.add(banben); help.setEnabled(true); MenuBar menubar = new MenuBar(); menubar.add(file); menubar.add(assess); menubar.add(checkout); menubar.add(statistics); menubar.add(help); setMenuBar(menubar); // panel setting - cardlayout panel1.add(newuser);panel2.add(update);panel3.add(stat);panel4.add(lg); setLayout(new BorderLayout()); // addlistener tuichu.addActionListener(this); banben.addActionListener(this); zhuce.addActionListener(this); gengxin.addActionListener(this); tongj.addActionListener(this); denglu.addActionListener(this); setExtendedState(MAXIMIZED_BOTH); addWindowListener(this); setVisible(true); } // implements windowlistener public void windowClosing(WindowEvent we) { System.exit(0); } public void windowOpened(WindowEvent we) { } public void windowIconified(WindowEvent we) { } public void windowDeiconified(WindowEvent we) { } public void windowClosed(WindowEvent we) { } public void windowActivated(WindowEvent we) { } public void windowDeactivated(WindowEvent we) { } // mouse event public void actionPerformed(ActionEvent e) { if (e.getSource() == tuichu) { ConfirmDialog tuichu = new ConfirmDialog(this, "确认", "确定要退出?"); if (tuichu.isOkay) System.exit(0); } if (e.getSource() == banben) { VersionDialog banben = new VersionDialog(this, "版本", "1.0"); } if (e.getSource() == zhuce) { panel1.invalidate(); panel1.repaint(); panel2.setVisible(false); panel3.setVisible(false); panel4.setVisible(false); add("Center", panel1); panel1.show(); } if (e.getSource() == gengxin) { panel1.setVisible(false); panel3.setVisible(false); panel4.setVisible(false); add("Center", panel2); update.repaint(); panel2.show(); } if(e.getSource()==tongj){ panel1.setVisible(false); panel2.setVisible(false); panel4.setVisible(false); add("Center", panel3); stat.repaint(); panel3.show(); } if(e.getSource()==denglu){ panel1.setVisible(false); panel2.setVisible(false); panel3.setVisible(false); add("Center", panel4); stat.repaint(); panel4.show(); } } public static void main(String[] args) { PeopleManagement peoman = new PeopleManagement(); }}import java.awt.*;import java.awt.event.*;import java.io.UnsupportedEncodingException;import java.sql.Connection;import java.sql.DriverManager;import java.sql.ResultSet;import java.sql.Statement;public class NewUser extends Panel implements ActionListener { private Button quit = new Button("退出"); private Button sure = new Button("确定"); private TextField text1 = new TextField(10); private TextField text2 = new TextField(10); private TextField text3 = new TextField(10); private TextField text4 = new TextField(10); private TextField text5 = new TextField(10); private TextField text6 = new TextField(10); private Label title = new Label("注册新用户"); private Label number = new Label("学号"); private Label name = new Label("姓名"); private Label sex = new Label("性别"); private Label age = new Label("年龄"); private Label hometown = new Label("籍贯"); private Label department = new Label("系别"); private void setup() { Panel panel1 = new Panel();Panel panel2 = new Panel(); Panel panel3 = new Panel();Panel panel4 = new Panel(); Panel panel5 = new Panel();Panel panel6 = new Panel(); Panel panel7 = new Panel();Panel panel8 = new Panel(); panel1.setLayout(new FlowLayout());panel1.add(title); panel2.setLayout(new FlowLayout());panel2.add(number);panel2.add(text1); panel3.setLayout(new FlowLayout());panel3.add(name);panel3.add(text2); panel4.setLayout(new FlowLayout());panel4.add(sex);panel4.add(text3); panel5.setLayout(new FlowLayout());panel5.add(age);panel5.add(text4); panel6.setLayout(new FlowLayout());panel6.add(hometown);panel6.add(text5); panel7.setLayout(new FlowLayout());panel7.add(department);panel7.add(text6); panel8.setLayout(new FlowLayout());panel8.add(sure);panel8.add(quit); setLayout(new GridLayout(10,1)); add(panel1);add(panel2);add(panel3);add(panel4); add(panel5);add(panel6);add(panel7);add(panel8); setVisible(true); } public void actionPerformed(ActionEvent ae) { if (ae.getSource() == sure) { String url, sql,xuehao,xingming,xingbie,nianling,jiguan,xibie; int i; xuehao=text1.getText().trim(); xingming=text2.getText().trim(); xingbie=text3.getText().trim(); nianling=text4.getText().trim(); i=Integer(nianling); jiguan=text5.getText().trim(); xibie=text6.getText().trim(); Connection conn; ResultSet rs; Statement stmt; try { Class.forName("sun.jdbc.odbc.JdbcOdbcDriver"); // Class.forName("com.microsoft.jdbc.sqlserver.SQLServerDriver").newInstance(); url = "jdbc:odbc:university"; // url = // "jdbc:microsoft:sqlserver://localhost:1433;DatabaseName=university"; conn = DriverManager.getConnection(url, "admin", "123456");// 建立与数据库的连接 stmt = conn.createStatement(); sql="select * from student where xuehao='"+number+"'"; rs=stmt.executeQuery(sql); sql="insert into student(xuehao,name,sex,age,jiguan,dept)"; sql=sql+"values('"+xuehao+"','"+xingming+"','"+xingbie+"','"+i+"','"+jiguan+"','"+xibie+"')"; stmt.execute(sql); rs.close(); stmt.close(); conn.close(); } catch (Exception e) { System.out.println(e); } } if(ae.getSource() == quit){ invalidate(); } } private void dispose() { // TODO Auto-generated method stub } private int Integer(String nianling) { // TODO Auto-generated method stub return 0; } public NewUser() { setup(); sure.addActionListener(this); quit.addActionListener(this); }} 关于记事本查找显示的问题 时间? 如何结束我当前的线程 求助!Jcheckbox里面的对号怎么变颜色呢? 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import java.awt.event.*;public class PeopleManagement extends Frame implements ActionListener,
WindowListener {
// insert,update,quit
private MenuItem zhuce = new MenuItem("注册");
private MenuItem denglu=new MenuItem("登录");
private MenuItem gengxin = new MenuItem("更新");
private MenuItem zhuxiao = new MenuItem("注销");
private MenuItem tuichu = new MenuItem("退出");
// assess the performance of an employee formally
private MenuItem gongzi = new MenuItem("评定工资");
private MenuItem jintie = new MenuItem("评定津贴");
// checkout personal info
private MenuItem renming = new MenuItem("人名");
private MenuItem zhicheng = new MenuItem("职称");
// statistics
private MenuItem tongj = new MenuItem("按类别统计详情");
// version
private MenuItem banben = new MenuItem("版本");
// panel
private Panel panel1 = new Panel();
private Panel panel2 = new Panel();
private Panel panel3 = new Panel();
private Panel panel4 = new Panel();
Update update= new Update();
NewUser newuser = new NewUser();
Statistics stat = new Statistics();
Login lg = new Login();
// constructor
public PeopleManagement() {
super("人事管理系统");
// menubar setting Menu file = new Menu("登录");
file.add(zhuce);
zhuce.setEnabled(true);
file.add(denglu);
denglu.setEnabled(true);
file.add(gengxin);
gengxin.setEnabled(true);
file.add(zhuxiao);
zhuxiao.setEnabled(true);
file.addSeparator();
file.add(tuichu);
tuichu.setEnabled(true);
Menu assess = new Menu("业绩评估");
assess.add(gongzi);
gongzi.setEnabled(true);
assess.add(jintie);
jintie.setEnabled(true);
Menu checkout = new Menu("人事查询");
checkout.add(renming);
renming.setEnabled(true);
checkout.add(zhicheng);
zhicheng.setEnabled(true);
Menu statistics = new Menu("统计报表");
statistics.add(tongj);
tongj.setEnabled(true);
Menu help = new Menu("帮助");
help.add(banben);
help.setEnabled(true);
MenuBar menubar = new MenuBar();
menubar.add(file);
menubar.add(assess);
menubar.add(checkout);
menubar.add(statistics);
menubar.add(help);
setMenuBar(menubar);
// panel setting - cardlayout
panel1.add(newuser);panel2.add(update);panel3.add(stat);panel4.add(lg);
setLayout(new BorderLayout());
// addlistener
tuichu.addActionListener(this);
banben.addActionListener(this);
zhuce.addActionListener(this);
gengxin.addActionListener(this);
tongj.addActionListener(this);
denglu.addActionListener(this);
setExtendedState(MAXIMIZED_BOTH);
addWindowListener(this);
setVisible(true); } // implements windowlistener
public void windowClosing(WindowEvent we) {
System.exit(0);
} public void windowOpened(WindowEvent we) {
} public void windowIconified(WindowEvent we) {
} public void windowDeiconified(WindowEvent we) {
} public void windowClosed(WindowEvent we) {
} public void windowActivated(WindowEvent we) {
} public void windowDeactivated(WindowEvent we) {
} // mouse event
public void actionPerformed(ActionEvent e) {
if (e.getSource() == tuichu) {
ConfirmDialog tuichu = new ConfirmDialog(this, "确认", "确定要退出?");
if (tuichu.isOkay)
System.exit(0);
}
if (e.getSource() == banben) {
VersionDialog banben = new VersionDialog(this, "版本",
"1.0");
}
if (e.getSource() == zhuce) {
panel1.invalidate();
panel1.repaint();
panel2.setVisible(false);
panel3.setVisible(false);
panel4.setVisible(false);
add("Center", panel1);
panel1.show(); }
if (e.getSource() == gengxin) {
panel1.setVisible(false);
panel3.setVisible(false);
panel4.setVisible(false);
add("Center", panel2);
update.repaint();
panel2.show();
}
if(e.getSource()==tongj){
panel1.setVisible(false);
panel2.setVisible(false);
panel4.setVisible(false);
add("Center", panel3);
stat.repaint();
panel3.show();
}
if(e.getSource()==denglu){
panel1.setVisible(false);
panel2.setVisible(false);
panel3.setVisible(false);
add("Center", panel4);
stat.repaint();
panel4.show();
}
}
public static void main(String[] args) {
PeopleManagement peoman = new PeopleManagement();
}
}import java.awt.*;
import java.awt.event.*;
import java.io.UnsupportedEncodingException;
import java.sql.Connection;
import java.sql.DriverManager;
import java.sql.ResultSet;
import java.sql.Statement;public class NewUser extends Panel implements ActionListener {
private Button quit = new Button("退出");
private Button sure = new Button("确定");
private TextField text1 = new TextField(10);
private TextField text2 = new TextField(10);
private TextField text3 = new TextField(10);
private TextField text4 = new TextField(10);
private TextField text5 = new TextField(10);
private TextField text6 = new TextField(10);
private Label title = new Label("注册新用户");
private Label number = new Label("学号");
private Label name = new Label("姓名");
private Label sex = new Label("性别");
private Label age = new Label("年龄");
private Label hometown = new Label("籍贯");
private Label department = new Label("系别"); private void setup() {
Panel panel1 = new Panel();Panel panel2 = new Panel();
Panel panel3 = new Panel();Panel panel4 = new Panel();
Panel panel5 = new Panel();Panel panel6 = new Panel();
Panel panel7 = new Panel();Panel panel8 = new Panel();
panel1.setLayout(new FlowLayout());panel1.add(title);
panel2.setLayout(new FlowLayout());panel2.add(number);panel2.add(text1);
panel3.setLayout(new FlowLayout());panel3.add(name);panel3.add(text2);
panel4.setLayout(new FlowLayout());panel4.add(sex);panel4.add(text3);
panel5.setLayout(new FlowLayout());panel5.add(age);panel5.add(text4);
panel6.setLayout(new FlowLayout());panel6.add(hometown);panel6.add(text5);
panel7.setLayout(new FlowLayout());panel7.add(department);panel7.add(text6);
panel8.setLayout(new FlowLayout());panel8.add(sure);panel8.add(quit);
setLayout(new GridLayout(10,1));
add(panel1);add(panel2);add(panel3);add(panel4);
add(panel5);add(panel6);add(panel7);add(panel8);
setVisible(true);
}
public void actionPerformed(ActionEvent ae) {
if (ae.getSource() == sure) {
String url, sql,xuehao,xingming,xingbie,nianling,jiguan,xibie;
int i;
xuehao=text1.getText().trim();
xingming=text2.getText().trim();
xingbie=text3.getText().trim();
nianling=text4.getText().trim();
i=Integer(nianling);
jiguan=text5.getText().trim();
xibie=text6.getText().trim();
Connection conn;
ResultSet rs;
Statement stmt;
try {
Class.forName("sun.jdbc.odbc.JdbcOdbcDriver");
// Class.forName("com.microsoft.jdbc.sqlserver.SQLServerDriver").newInstance();
url = "jdbc:odbc:university";
// url =
// "jdbc:microsoft:sqlserver://localhost:1433;DatabaseName=university";
conn = DriverManager.getConnection(url, "admin", "123456");// 建立与数据库的连接
stmt = conn.createStatement();
sql="select * from student where xuehao='"+number+"'";
rs=stmt.executeQuery(sql);
sql="insert into student(xuehao,name,sex,age,jiguan,dept)";
sql=sql+"values('"+xuehao+"','"+xingming+"','"+xingbie+"','"+i+"','"+jiguan+"','"+xibie+"')";
stmt.execute(sql);
rs.close();
stmt.close();
conn.close();
} catch (Exception e) {
System.out.println(e);
}
}
if(ae.getSource() == quit){
invalidate();
}
}
private void dispose() {
// TODO Auto-generated method stub
}
private int Integer(String nianling) {
// TODO Auto-generated method stub
return 0;
}
public NewUser() {
setup();
sure.addActionListener(this);
quit.addActionListener(this);
}
}