简单java系统源代码 java编程源码

求一个简单地Java语言写的科研成果管理系统的源代码

以下方法实现了用户界面登陆importjava.awt.*;importjava.awt.event.*;publicclassDengLuJieMianextendsFrameimplementsActionListener{Labelusername=newLabel("用户名：");//使用文本创建一个用户名标签TextFieldt1=newTextField();//创建一个文本框对象Labelpassword=newLabel("密码：");//创建一个密码标签TextFieldt2=newTextField();Buttonb1=newButton("登陆");//创建登陆按钮Buttonb2=newButton("取消");//创建取消按钮publicDengLuJieMian(){this.setTitle("学生信息管理系统");//设置窗口标题this.setLayout(null);//设置窗口布局管理器username.setBounds(50,40,60,20);//设置姓名标签的初始位置this.add(username);//将姓名标签组件添加到容器t1.setBounds(120,40,80,20);//设置文本框的初始位置this.add(t1);//将文本框组件添加到容器password.setBounds(50,100,60,20);//密码标签的初始位置this.add(password);//将密码标签组件添加到容器t2.setBounds(120,100,80,20);//设置密码标签的初始位置this.add(t2);//将密码标签组件添加到容器b1.setBounds(50,150,60,20);//设置登陆按钮的初始位置this.add(b1);//将登陆按钮组件添加到容器b2.setBounds(120,150,60,20);//设置取消按钮的初始位置this.add(b2);//将取消按钮组件添加到容器b1.addActionListener(this);//给登陆按钮添加监听器b2.addActionListener(this);//给取消按钮添加监听器this.setVisible(true);//设置窗口的可见性this.setSize(300,200);//设置窗口的大小addWindowListener(newWindowAdapter(){publicvoidwindowClosing(WindowEvente){System.exit(0);}});//通过内部类重写关闭窗体的方法}publicvoidactionPerformed(ActionEvente){if(e.getSource()==b1)//处理登陆事件{Stringname=t1.getText();Stringpass=t2.getText();if(name!=nullpass.equals("000123"))//判断语句{newStudentJieMian();}}}publicstaticvoidmain(Stringargs[])//主函数{newDengLuJieMian();}}以下方法实现了学生界面设计importjava.awt.*;importjava.awt.event.*;classStudentJieMianextendsFrameimplementsActionListener{MenuBarm=newMenuBar();//创建菜单栏Menum1=newMenu("信息");//创建菜单“信息”MenuItemm11=newMenuItem("插入");//创建“插入”的菜单项MenuItemm12=newMenuItem("查询");Menum2=newMenu("成绩");//创建菜单“成绩”MenuItemm21=newMenuItem("查询");publicStudentJieMian(){this.setTitle("学生界面");//设置窗口标题this.setLayout(newCardLayout());//设置窗口布局管理器this.setMenuBar(m);//将菜单栏组件添加到容器m.add(m1);//将信息菜单放入菜单栏m.add(m2);m1.add(m11);//将“插入”菜单项添加到“信息”菜单m1.add(m12);//将“查询”菜单项添加到“信息”菜单m2.add(m21);//将“查询”菜单项添加到“成绩”菜单m11.addActionListener(this);//给“插入”菜单项添加监听器m12.addActionListener(this);//给“查询”菜单项添加监听器m21.addActionListener(this);//给“查询”菜单项添加监听器this.setVisible(true);//设置窗口的可见性this.setSize(300,200);//设置窗口的大小addWindowListener(newWindowAdapter(){publicvoidwindowClosing(WindowEvente){System.exit(0);//关闭窗口}});}publicvoidactionPerformed(ActionEvente){if(e.getSource()==m11)//处理“添加信息”事件{newAddStudent();}if(e.getSource()==m12)//处理“查询信息”事件{newSelectStudent();}if(e.getSource()==m21)//处理“查询成绩”事件{newChengJiStudent();}}publicstaticvoidmain(Stringargs[]){newStudentJieMian();//创建一个对象}

相关问答

Q1: 什么是java源代码 怎么查看

简单java系统源代码你说的java源代码是指编译成的class文件前的java文件。

当简单java系统源代码我们运行.java文件时简单java系统源代码，它会被系统编译成.class文件简单java系统源代码，例如Test.java编译之后就是Test.class，

源文件就是指Test.java文件，

一般部署项目时，有.class文件就可以发布运行简单java系统源代码了，但是如果想修改这个系统，.class是不能修改的，要有.java文件才能修改

也可以上网去下反编译软件，就是能把.class文件大部分还原成.java文件的工具，但不是100%还原，而且如果不是正版的，小心有毒啊，什么的。

Q2: 求编写一个超级简单的Java的程序源代码

import java.awt.*;

import java.awt.event.*;

import javax.swing.*;

class ConstructFrame extends JFrame

{

private static final long serialVersionUID = 1L;

String value1="",result,value2="";

int flag=0,fix=0,sum=1;

Boolean happy;

JTextField text=new JTextField(30);

int flagsum=0;

Container c=getContentPane();

JButton buttonx;

ConstructFrame()

{ super("计算器");

c.setLayout(null);

c.setBackground(Color.blue);

this.setSize(400, 400);

c.add(text);

text.setHorizontalAlignment(JTextField.RIGHT);

final JButton buttonx=new JButton("BackSpace");

c.add(buttonx);

buttonx.addMouseListener(new MouseAdapter()

{

public void mousePressed(MouseEvent e)

{

int count=0;

String temp;

if(flag==0)

{

count=value1.length();

if(count!=1)

temp=value1.substring(0, count-1);

else

temp="0";

value1=temp;

}

else

{

count=value2.length();

if(count!=1)

temp=value2.substring(0, count-1);

else

temp="0";

value2=temp;

}

text.setText(temp);

}

});

final JButton buttony=new JButton("CE");

c.add(buttony);

buttony.addMouseListener(new MouseAdapter()

{

public void mousePressed(MouseEvent e)

{

value1="";

value2="";

flag=0;

text.setText("0");

}

});

final JButton button1=new JButton("1");

c.add(button1);

button1.addMouseListener(new MouseAdapter()

{

public void mousePressed(MouseEvent e)

{

String temp;

if(flag==0)

{

value1=value1+1;

temp=value1;

}

else

{

value2=value2+1;

temp=value2;

}

text.setText(temp);

}

});

final JButton button2=new JButton(" 2 ");

c.add(button2);

button2.addMouseListener(new MouseAdapter()

{

public void mousePressed(MouseEvent e)

{

String temp;

if(flag==0)

{

value1=value1+2;

temp=value1;

}

else

{

value2=value2+2;

temp=value2;

}

text.setText(temp);

}

});

final JButton button3=new JButton("3");

c.add(button3);

button3.addMouseListener(new MouseAdapter()

{

public void mousePressed(MouseEvent e)

{

String temp;

if(flag==0)

{

value1=value1+3;

temp=value1;

}

else

{

value2=value2+3;

temp=value2;

}

text.setText(temp);

}

});

final JButton button4=new JButton("4");

c.add(button4);

button4.addMouseListener(new MouseAdapter()

{

public void mousePressed(MouseEvent e)

{

String temp;

if(flag==0)

{

value1=value1+4;

temp=value1;

}

else

{

value2=value2+4;

temp=value2;

}

text.setText(temp);

}

});

final JButton button5=new JButton("5");

c.add(button5);

button5.addMouseListener(new MouseAdapter()

{

public void mousePressed(MouseEvent e)

{

String temp;

if(flag==0)

{

value1=value1+5;

temp=value1;

}

else

{

value2=value2+5;

temp=value2;

}

text.setText(temp);

}

});

final JButton button6=new JButton("6");

c.add(button6);

button6.addMouseListener(new MouseAdapter()

{

public void mousePressed(MouseEvent e)

{

String temp;

if(flag==0)

{

value1=value1+6;

temp=value1;

}

else

{

value2=value2+6;

temp=value2;

}

text.setText(temp);

}

});

final JButton button7=new JButton("7");

c.add(button7);

button7.addMouseListener(new MouseAdapter()

{

public void mousePressed(MouseEvent e)

{

String temp;

if(flag==0)

{

value1=value1+7;

temp=value1;

}

else

{

value2=value2+7;

temp=value2;

}

text.setText(temp);

}

});

final JButton button8=new JButton("8");

c.add(button8);

button8.addMouseListener(new MouseAdapter()

{

public void mousePressed(MouseEvent e)

{

String temp;

if(flag==0)

{

value1=value1+8;

temp=value1;

}

else

{

value2=value2+8;

temp=value2;

}

text.setText(temp);

}

});

final JButton button9=new JButton("9");

c.add(button9);

button9.addMouseListener(new MouseAdapter()

{

public void mousePressed(MouseEvent e)

{

String temp;

if(flag==0)

{

value1=value1+9;

temp=value1;

}

else

{

value2=value2+9;

temp=value2;

}

text.setText(temp);

}

});

final JButton button0=new JButton("0");

c.add(button0);

button0.addMouseListener(new MouseAdapter()

{

public void mousePressed(MouseEvent e)

{

String temp;

if(flag==0)

{

value1=value1+0;

temp=value1;

}

else

{

value2=value2+0;

temp=value2;

}

text.setText(temp);

}

});

final JButton buttonadd=new JButton(" + ");

c.add(buttonadd);

buttonadd.addMouseListener(new MouseAdapter()

{

public void mousePressed(MouseEvent e)

{

flag=1;

fix=1;

flagsum=0;

}

});

final JButton buttonsubtract=new JButton(" - ");

c.add(buttonsubtract);

buttonsubtract.addMouseListener(new MouseAdapter()

{

public void mousePressed(MouseEvent e)

{

flag=1;

fix=2;

flagsum=0;

}

});

final JButton buttoncheng=new JButton(" * ");

c.add(buttoncheng);

buttoncheng.addMouseListener(new MouseAdapter()

{

public void mousePressed(MouseEvent e)

{

flag=1;

fix=3;

flagsum=0;

}

});

final JButton buttonchu=new JButton(" / ");

c.add(buttonchu);

buttonchu.addMouseListener(new MouseAdapter()

{

public void mousePressed(MouseEvent e)

{

flag=1;

flagsum=0;

fix=4;

}

});

final JButton buttonequal=new JButton(" = ");

c.add(buttonequal);

buttonequal.addMouseListener(new MouseAdapter()

{

public void mousePressed(MouseEvent e)

{

double temp1,temp2;

double temp=0;

flagsum=0;

temp1=Double.parseDouble(value1);

temp2=Double.parseDouble(value2);

flag=0;

switch(fix)

{

case 1: temp=temp1+temp2;break;

case 2: temp=temp1-temp2;break;

case 3: temp=temp1*temp2;break;

case 4: temp=temp1/temp2;break;

}

result=Double.valueOf(temp).toString();

value1=result;

value2="";

flag=1;

text.setText(result);

}

});

final JButton buttonpoint=new JButton(".");

c.add(buttonpoint);

buttonpoint.addMouseListener(new MouseAdapter()

{

public void mousePressed(MouseEvent e)

{ if(flagsum==0)

{

String temp;

if(flag==0 )

{

value1=value1+".";

temp=value1;

}

else

{

value2=value2+".";

temp=value2;

}

flagsum=1;

text.setText(temp);

}

}

});

JButton buttonz=new JButton("Start");

c.add(buttonz);

buttonz.addMouseListener(new MouseAdapter()

{

public void mousePressed(MouseEvent e)

{ if(sum%2==1)

{

happy=true;

text.setText("0.");

flag=0;

}

else

{

happy=false;

value1="";

value2="";

text.setText("");

}

text.setEnabled(happy);

button1.setEnabled(happy);

button2.setEnabled(happy);

button3.setEnabled(happy);

button4.setEnabled(happy);

button5.setEnabled(happy);

button6.setEnabled(happy);

button7.setEnabled(happy);

button8.setEnabled(happy);

button9.setEnabled(happy);

button0.setEnabled(happy);

buttonx.setEnabled(happy);

buttony.setEnabled(happy);

buttonadd.setEnabled(happy);

buttonsubtract.setEnabled(happy);

buttonpoint.setEnabled(happy);

buttonequal.setEnabled(happy);

buttoncheng.setEnabled(happy);

buttonchu.setEnabled(happy);

sum++;

}

});

button1.setEnabled(false);

button2.setEnabled(false);

button3.setEnabled(false);

button4.setEnabled(false);

button5.setEnabled(false);

button6.setEnabled(false);

button7.setEnabled(false);

button8.setEnabled(false);

button9.setEnabled(false);

button0.setEnabled(false);

buttonx.setEnabled(false);

buttony.setEnabled(false);

buttonadd.setEnabled(false);

buttonsubtract.setEnabled(false);

buttonpoint.setEnabled(false);

buttonequal.setEnabled(false);

buttoncheng.setEnabled(false);

buttonchu.setEnabled(false);

text.setEnabled(false);

text.setBounds(20, 20, 200, 40);

buttonx.setBounds(20, 60,100, 40);

buttony.setBounds(140, 60,100, 40);

buttonz.setBounds(260, 60,80, 40);

button1.setBounds(20, 120,60, 40);

button2.setBounds(100, 120,60, 40);

button3.setBounds(180, 120,60, 40);

buttonadd.setBounds(260, 120,60, 40);

button4.setBounds(20, 180,60, 40);

button5.setBounds(100, 180,60, 40);

button6.setBounds(180, 180,60, 40);

buttonsubtract.setBounds(260, 180,60, 40);

button7.setBounds(20, 240,60, 40);

button8.setBounds(100, 240,60, 40);

button9.setBounds(180, 240,60, 40);

buttoncheng.setBounds(260,240,60,40);

button0.setBounds(20, 300,60, 40);

buttonpoint.setBounds(100, 300, 60, 40);

buttonequal.setBounds(180,300,60, 40);

buttonchu.setBounds(260, 300,60, 40);

setVisible(true);

}

class MYMouseEvent extends MouseAdapter

{

public void mousePressed(MouseEvent e)

{

value1=e.toString();

text.setText(value1);

}

}

}

class Calutator

{

public static void main(String[] args)

{

new ConstructFrame();

}

}

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