第十二周总结

实验一：登录图形界面

实验代码

package Circle;
import java.awt.*;
import java.awt.event.*;
import javax.swing.*;

public class Modle {

    public static void main(String[] args) {
        JFrame frame=new JFrame("Welcome To MLDN");
        JButton submit=new JButton("登录");
        JButton reset=new JButton("重置");
        JLabel nameLabel=new JLabel ("用户名：");
        JLabel passLabel=new JLabel ("密码：");
        JLabel infoLab=new JLabel ("用户登录系统：");
        JTextField nameTest=new JTextField();
        JPasswordField passTest=new JPasswordField();
        
        submit.addActionListener(new ActionListener() {         //登录采用匿名内部类
            public void actionPerformed(ActionEvent argo) {
                if(argo.getSource()==submit) {
                    String tname=nameTest.getText();
                    String tpass=new String(passTest.getPassword());
                    LoginCheck log=new LoginCheck(tname,tpass);
                    if(log.validate()) {
                        infoLab.setText("登录成功，记住密码");
                    }else {
                        infoLab.setText("登录失败！");
                    }
                }
                if (nameLabel.getText().equals("tanminjie") &&new String().equals("546788")){
                    JOptionPane.showMessageDialog(null, "登陆成功！");//弹出框判断是否成功
                } 
            }
        }); 
        
       frame.addWindowListener(new WindowAdapter() {
            public void windowClosing(WindowEvent arg0) {
               System.exit(1);
            }
        }); 
        frame.setLayout(null);//使用绝对定位
        nameLabel.setBounds(5, 5, 60, 20);
        passLabel.setBounds(5, 30, 60, 20);
        infoLab.setBounds(5, 65, 220, 30);
        nameTest.setBounds(65, 5, 100, 20);
        passTest.setBounds(65, 30, 100, 20);
        submit.setBounds(165, 5, 60, 20);
        reset.setBounds(165, 30, 60, 20);
        
        frame.add(nameLabel);
        frame.add(passLabel);
        frame.add(nameTest);
        frame.add(passTest);
        frame.add(infoLab);
        frame.add(submit);
        frame.add(reset); 
        frame.setSize(280, 130);
        frame.setVisible(true);
    }
    }

实验结果截图

上机作业写错了，继续。

package Circle;
import java.io.*;
public class D{
    public static void main(String[] args)throws IOException {
        String path1="F:"+File.separator+"Test"+File.separator+"demo1.txt";
        String path2="F:"+File.separator+"Test"+File.separator+"demo2.txt";
        File f1=new File(path1);
        File f2=new File(path2);
        
        InputStream input=new FileInputStream(f1);
        OutputStream out=new FileOutputStream(f2);
        
        byte b[]=new byte[(int)f1.length()];
        input.read(b);
        String m1=new String(b);
        char ah[]=m1.toCharArray();
        for(int i=0;i<ah.length;i++) {
            if(ah[i]>='a'&&ah[i]<='z'){
                ah[i]=(char)(ah[i]-32);
            }
            else if(ah[i]>='A'&&ah[i]<='Z') {
                ah[i]=(char)(ah[i]+32);
            }
        }
        String m2=new String(ah);
        byte a2[]=m2.getBytes();
        out.write(a2);
        
        try {
            input.close();
            out.close();
        }
        catch(IOException e){
            e.printStackTrace();
        }
    }

    }