java简单爱心源码(java最简单的代码)
大家好，java简单爱心源码相信很多的网友都不是很明白，包括java最简单的代码也是一样，不过没有关系，接下来就来为大家分享关于java简单爱心源码和java最简单的代码的一些知识点，大家可以关注收藏，免得下次来找不到哦，下面我们开始吧！
急求一段简单的java源代码(用户名、密码操作界面)
下面的程序可以直接通过编译运行，自己寻找要用到的代码段。
import java.awt.GridLayout;
import java.awt.event.ActionEvent;
import java.awt.event.ActionListener;
import java.awt.event.FocusEvent;
import java.awt.event.FocusListener;
import java.io.File;
import java.io.IOException;
import java.io.RandomAccessFile;
import javax.swing.BoxLayout;
import javax.swing.JFrame;
import javax.swing.JLabel;
import javax.swing.JPanel;
import javax.swing.JPasswordField;
import javax.swing.JTextField;
public class UserLogin extends JPanel implements ActionListener{
JTextField userjt=null;//用户输入框
JPasswordField pwdjt=null;
JTextField sysUserjt=null;//系统显示用户名输入框
JTextField sysPwdjt=null;
public UserLogin(){
super(new GridLayout(1,2));
JPanel userPanel=new JPanel();//用户界面，左边
userPanel.setLayout(new BoxLayout(userPanel,BoxLayout.Y_AXIS));
this.add(userPanel);
JPanel userUpPanel=new JPanel();//用户界面上半部分
userPanel.add(userUpPanel);
JPanel userDownPanel=new JPanel();//用户界面下半部分
userPanel.add(userDownPanel);
JPanel sysPanel=new JPanel();//系统界面，右边
sysPanel.setLayout(new BoxLayout(sysPanel,BoxLayout.Y_AXIS));
this.add(sysPanel);
JPanel sysUserPanel=new JPanel();//系统界面上半部分
sysPanel.add(sysUserPanel);
JPanel sysPwdPanel=new JPanel();//系统界面下半部分
sysPanel.add(sysPwdPanel);
userjt=new JTextField(5);
userjt.setText("用户名");
userUpPanel.add(userjt);
pwdjt=new JPasswordField(5);
pwdjt.setText("密码");
pwdjt.setEchoChar('\0');
userDownPanel.add(pwdjt);
JLabel sysUserjl=new JLabel("用户名为：");
sysUserPanel.add(sysUserjl);
sysUserjt=new JTextField(5);
sysUserPanel.add(sysUserjt);
JLabel sysPwdjl=new JLabel("密码为：");
sysPwdPanel.add(sysPwdjl);
sysPwdjt=new JTextField(5);
sysPwdPanel.add(sysPwdjt);
userjt.addActionListener(this);
pwdjt.addActionListener(this);
userjt.addFocusListener(new FocusListener(){
public void focusGained(FocusEvent e){
if(userjt.getText().equals("用户名"))
userjt.setText("");
}
public void focusLost(FocusEvent e){
if(userjt.getText().equals(""))
userjt.setText("用户名");
}});
pwdjt.addFocusListener(new FocusListener(){
public void focusGained(FocusEvent e){
if(new String(pwdjt.getPassword()).equals("密码")){
pwdjt.setText("");
pwdjt.setEchoChar('*');
}
}
public void focusLost(FocusEvent e){
if(new String(pwdjt.getPassword()).equals("")){
pwdjt.setText("密码");
pwdjt.setEchoChar('\0');
}
}});
}
public void actionPerformed(ActionEvent e){
if(e.getSource().equals(userjt)){
pwdjt.requestFocus();
}else{
if(new String(pwdjt.getPassword()).equals("")||userjt.getText().equals("")||userjt.getText().equals("用户名")) return;
sysUserjt.setText(userjt.getText());
sysPwdjt.setText(new String(pwdjt.getPassword()));
try{
writetoFile();
} catch(IOException e1){
System.out.println("写入文件发生异常！");
e1.printStackTrace();
}
}
}
private void writetoFile() throws IOException{
File f=new File("User_Psd.txt");
// if(!f.exists()) f.createNewFile();
RandomAccessFile accessFile=new RandomAccessFile(f,"rw");
accessFile.seek(accessFile.length());
accessFile.write(("user:"+userjt.getText()+"\r\npassword:"+new String(pwdjt.getPassword())+"\r\n\r\n").getBytes());
}
public static void main(String args[]){
JFrame jf=new JFrame("用户登陆模块测试");
jf.setDefaultCloseOperation(jf.EXIT_ON_CLOSE);
jf.add(new UserLogin());
jf.setBounds(400,300,280,150);
jf.setVisible(true);
}
}
高分求两个简单的JAVA设计源代码
上面 wuzhikun12同学写的不错，但我想还不能运行，并且还不太完善。我给个能运行的：（注意：文件名为：Test.java)
//要实现对象间的比较，就必须实现Comparable接口，它里面有个compareTo方法
//Comparable最好使用泛型，这样，无论是速度还是代码量都会减少
@SuppressWarnings("unchecked")
class Student implements Comparable<Student>{
private String studentNo;//学号
private String studentName;//姓名
private double englishScore;//英语成绩
private double computerScore;//计算机成绩
private double mathScore;//数学成绩
private double totalScore;//总成绩
//空构造函数
public Student(){}
//构造函数
public Student(String studentNo,String studentName,double englishSocre,double computerScore,double mathScore){
this.studentNo= studentNo;
this.studentName= studentName;
this.englishScore= englishSocre;
this.computerScore= computerScore;
this.mathScore= mathScore;
}
//计算总成绩
public double sum(){
this.totalScore= englishScore+computerScore+mathScore;
return totalScore;
}
//计算评测成绩
public double testScore(){
return sum()/3;
}
//实现compareTO方法
@Override
public int compareTo(Student student){
double studentTotal= student.getTotalScore();
return totalScore==studentTotal?0:(totalScore>studentTotal?1:-1);
}
//重写toString方法
public String toString(){
return"学号："+this.getStudentNo()+"姓名："+this.getStudentName()+"英语成绩："+this.getEnglishScore()+"数学成绩："+this.getMathScore()+"计算机成绩："+this.getComputerScore()+"总成绩："+this.getTotalScore();
}
//重写equals方法
public boolean equals(Object obj){
if(obj== null){
return false;
}
if(!(obj instanceof Student)){
return false;
}
Student student=(Student)obj;
if(this.studentNo.equals(student.getStudentName())){//照现实来说，比较是不是同一个学生，应该只是看他的学号是不是相同
return true;
} else{
return false;
}
}
/*以下为get和set方法，我个人认为，totalScore的set的方法没必要要，因为它是由其它成绩计算出来的
在set方法中，没设置一次值，调用一次sum方法，即重新计算总成绩
*/
public String getStudentNo(){
return studentNo;
}
public void setStudentNo(String studentNo){
this.studentNo= studentNo;
sum();
}
public String getStudentName(){
return studentName;
}
public void setStudentName(String studentName){
this.studentName= studentName;
sum();
}
public double getEnglishScore(){
return englishScore;
}
public void setEnglishScore(double englishScore){
this.englishScore= englishScore;
sum();
}
public double getComputerScore(){
return computerScore;
}
public void setComputerScore(double computerScore){
this.computerScore= computerScore;
sum();
}
public double getMathScore(){
return mathScore;
}
public void setMathScore(double mathScore){
this.mathScore= mathScore;
sum();
}
public double getTotalScore(){
return totalScore;
}
}
//Student子类学习委员类的实现
class StudentXW extends Student{
//重写父类Student的testScore()方法
@Override
public double testScore(){
return sum()/3+3;
}
public StudentXW(){}
//StudentXW的构造函数
public StudentXW(String studentNo,String studentName,double englishSocre,double computerScore,double mathScore){
super(studentNo,studentName,englishSocre,computerScore,mathScore);
}
}
//Student子类班长类的实现
class StudentBZ extends Student{
//重写父类Student的testScore()方法
@Override
public double testScore(){
return sum()/3+5;
}
public StudentBZ(){}
//StudentXW的构造函数
public StudentBZ(String studentNo,String studentName,double englishSocre,double computerScore,double mathScore){
super(studentNo,studentName,englishSocre,computerScore,mathScore);
}
}
//测试类
public class Test{
public static void main(String[] args){
//生成若干个student类、StudentXW类、StudentBZ类
Student student1= new Student("s001","张三",70.5,50,88.5);
Student student2= new Student("s002","李四",88,65,88.5);
Student student3= new Student("s003","王五",67,77,90);
StudentXW student4= new StudentXW("s004","李六",99,88,99.5);
StudentBZ student5= new StudentBZ("s005","朱漆",56,65.6,43.5);
Student[] students={student1,student2,student3,student4,student5};
for(int i= 0; i<students.length; i++){
double avgScore= students[i].testScore();
System.out.println(students[i].getStudentName()+"学生的评测成绩为："+ avgScore+"分");
}
}
}
运行结果为：
张三学生的评测成绩为：69.66666666666667分
李四学生的评测成绩为：80.5分
王五学生的评测成绩为：78.0分
李六学生的评测成绩为：98.5分
朱漆学生的评测成绩为：60.03333333333333分
java小游戏源代码
介绍这个给你把...我空间还有很多..
importjava.applet.Applet;
importjava.applet.AudioClip;
importjava.awt.Dimension;
importjava.awt.Font;
importjava.awt.Toolkit;
importjavax.sound.sampled.AudioFileFormat;
importjavax.sound.sampled.AudioSystem;
importjavax.swing.JFrame;
importjavax.swing.JPanel;
importjava.awt.Rectangle;
importjavax.swing.BorderFactory;
importjavax.swing.JButton;
importjavax.swing.JOptionPane;
importjavax.swing.JSlider;
importjavax.swing.JLabel;
importjavax.swing.SwingUtilities;
importjavax.swing.UIManager;
importjavax.swing.event.ChangeEvent;
importjavax.swing.event.ChangeListener;
importjava.awt.event.ActionEvent;
importjava.awt.event.ActionListener;
importjava.awt.event.KeyAdapter;
importjava.awt.event.KeyEvent;
importjava.io.File;
importjava.util.Vector;
publicclassFrameextendsJFrameimplementsRunnable{
JPanelcontentPane;
JPaneljPanel1=newJPanel();
JButtonjButton1=newJButton();
JSliderjSlider1=newJSlider();
JLabeljLabel1=newJLabel();
JButtonjButton2=newJButton();
JLabeljLabel2=newJLabel();
intcount=1,rapidity=80;//count当前进行的个数,rapidity游标的位置
intzhengque=0,cuowu=0;
intrush[]={10,20,30};//游戏每关的个数可以自由添加.列{10,20,30,40,50}
intrush_count=0;//记录关数
charlist[]={'A','B','C','D','E','F','G','H','I','J','K','L',
'M','N','O','P','Q','R','S','T','U','V','W','X','Y',
'Z','1','2','3','4','5','6','7','8','9'};//随机出现的数字可以自由添加
Vectornumber=newVector();
Stringpaiduan="true";
AudioClipMusci_anjian,Music_shibai,Music_chenggong;
publicFrame(){
try{
setDefaultCloseOperation(EXIT_ON_CLOSE);
//-----------------声音文件---------------------
Musci_anjian=Applet.newAudioClip(newFile("sounds//anjian.wav")
.toURL());
Music_shibai=Applet.newAudioClip(newFile("sounds//shibai.wav")
.toURL());
Music_chenggong=Applet.newAudioClip(newFile(
"sounds//chenggong.wav").toURL());
//---------------------------------------
jbInit();
}catch(Exceptionexception){
exception.printStackTrace();
}
}
/**
*Componentinitialization.
*
*@throwsjava.lang.Exception
*/
privatevoidjbInit()throwsException{
contentPane=(JPanel)getContentPane();
contentPane.setLayout(null);
setSize(newDimension(588,530));
setTitle("FrameTitle");
jPanel1.setBorder(BorderFactory.createEtchedBorder());
jPanel1.setBounds(newRectangle(4,4,573,419));
jPanel1.setLayout(null);
jButton1.setBounds(newRectangle(277,442,89,31));
jButton1.setText("开始");
jButton1.addActionListener(newFrame1_jButton1_actionAdapter(this));
jSlider1.setBounds(newRectangle(83,448,164,21));
jSlider1.setMaximum(100);
jSlider1.setMinimum(1);
jSlider1.setValue(50);
jLabel1.setText("速度");
jLabel1.setBounds(newRectangle(35,451,39,18));
jButton2.setBounds(newRectangle(408,442,89,31));
jButton2.setText("结束");
jButton2.addActionListener(newFrame1_jButton2_actionAdapter(this));
jLabel2.setText("第一关:100个");
jLabel2.setBounds(newRectangle(414,473,171,21));
contentPane.add(jPanel1);
contentPane.add(jButton2);
contentPane.add(jButton1);
contentPane.add(jSlider1);
contentPane.add(jLabel1);
contentPane.add(jLabel2);
this.addKeyListener(newMyListener());
jButton1.addKeyListener(newMyListener());
jSlider1.addKeyListener(newMyListener());
jSlider1.addChangeListener(newChangeListener(){
publicvoidstateChanged(ChangeEvente){
rapidity=jSlider1.getValue();
}
});
}
publicvoidrun(){
number.clear();
zhengque=0;
cuowu=0;
paiduan="true";
while(count<=rush[rush_count]){
try{
Threadt=newThread(newTthread());
t.start();
count+=1;
Thread.sleep(1000+(int)(Math.random()*2000));//生产下组停顿时间
//最快1快.最慢2秒
}catch(InterruptedExceptione){
e.printStackTrace();
}
}
while(true){//等待最后一个字符消失
if(number.size()==0){
break;
}
}
if(zhengque==0){//为了以后相除..如果全部正确或者错误就会出现错误.所以..
zhengque=1;
}
if(cuowu==0){
cuowu=1;
}
if(paiduan.equals("true")){//判断是否是自然结束
if(zhengque/cuowu>=2){
JOptionPane.showMessageDialog(null,"恭喜你过关了");
rush_count+=1;//自动加1关
if(rush_count<rush.length){
if(rapidity>10){//当速度大于10的时候在-5提加速度.怕速度太快
rapidity-=5;//速度自动减10毫秒
jSlider1.setValue(rapidity);//选择位置
}
Threadt=newThread(this);
t.start();
}else{
JOptionPane.showMessageDialog(null,"牛B...你通关了..");
rush_count=0;
count=0;
}
}else{
JOptionPane.showMessageDialog(null,"请再接再励");
rush_count=0;
count=0;
}
}else{
rush_count=0;
count=0;
}
}
publicvoidjButton1_actionPerformed(ActionEvente){
Threadt=newThread(this);
t.start();
}
publicvoidjButton2_actionPerformed(ActionEvente){
count=rush[rush_count]+1;
paiduan="flase";
}
classTthreadimplementsRunnable{
publicvoidrun(){
booleanfo=true;
intY=0,X=0;
JLabelshow=newJLabel();
show.setFont(newjava.awt.Font("宋体",Font.PLAIN,33));
jPanel1.add(show);
X=10+(int)(Math.random()*400);
Stringparameter=list[(int)(Math.random()*list.length)]+"";
Beanbean=newBean();
bean.setParameter(parameter);
bean.setShow(show);
number.add(bean);
show.setText(parameter);
while(fo){
//---------------------数字下移--------------------
show.setBounds(newRectangle(X,Y+=2,33,33));
try{
Thread.sleep(rapidity);
}catch(InterruptedExceptione){
e.printStackTrace();
}
if(Y>=419){
fo=false;
for(inti=number.size()-1;i>=0;i--){
Beanbn=((Bean)number.get(i));
if(parameter.equalsIgnoreCase(bn.getParameter())){
cuowu+=1;
jLabel2.setText("正确:"+zhengque+"个,错误:"+cuowu
+"个");
number.removeElementAt(i);
Music_shibai.play();
break;
}
}
}
}
}
}
classMyListenerextendsKeyAdapter{
publicvoidkeyPressed(KeyEvente){
Stringuu=e.getKeyChar()+"";
for(inti=0;i<number.size();i++){
Beanbean=((Bean)number.get(i));
if(uu.equalsIgnoreCase(bean.getParameter())){
zhengque+=1;
number.removeElementAt(i);
bean.getShow().setVisible(false);
jLabel2.setText("正确:"+zhengque+"个,错误:"+cuowu+"个");
Music_chenggong.play();
break;
}
}
Musci_anjian.play();
}
}
publicstaticvoidmain(String[]args){
try{
UIManager.setLookAndFeel(UIManager.getSystemLookAndFeelClassName());
}catch(Exceptionexception){
exception.printStackTrace();
}
Frameframe=newFrame();
DimensionscreenSize=Toolkit.getDefaultToolkit().getScreenSize();
DimensionframeSize=frame.getSize();
if(frameSize.height>screenSize.height){
frameSize.height=screenSize.height;
}
if(frameSize.width>screenSize.width){
frameSize.width=screenSize.width;
}
frame.setLocation((screenSize.width-frameSize.width)/2,
(screenSize.height-frameSize.height)/2);
frame.setVisible(true);
}
}
classFrame1_jButton2_actionAdapterimplementsActionListener{
privateFrameadaptee;
Frame1_jButton2_actionAdapter(Frameadaptee){
this.adaptee=adaptee;
}
publicvoidactionPerformed(ActionEvente){
adaptee.jButton2_actionPerformed(e);
}
}
classFrame1_jButton1_actionAdapterimplementsActionListener{
privateFrameadaptee;
Frame1_jButton1_actionAdapter(Frameadaptee){
this.adaptee=adaptee;
}
publicvoidactionPerformed(ActionEvente){
adaptee.jButton1_actionPerformed(e);
}
}
classBean{
Stringparameter=null;
JLabelshow=null;
publicJLabelgetShow(){
returnshow;
}
publicvoidsetShow(JLabelshow){
this.show=show;
}
publicStringgetParameter(){
returnparameter;
}
publicvoidsetParameter(Stringparameter){
this.parameter=parameter;
}
}
好了，文章到此结束，希望可以帮助到大家。