Java实验一——习题册+登陆界面 源代码

1.小学习题册

源代码：

import java.util.*;

public class Xitice {

java.util.Random random=new java.util.Random();  //随机产生一个数字

public void set()

{

          for(int a=0;a<=30;a++){

                 

                  if(a==1||a-4*((a-1)/4)==1){

                           int n=random.nextInt(50)+1;

                           int m=random.nextInt(50)+30;

                           System.out.println(n+"+"+m+"=");

                  }

                 

                  if(a==2||a-4*((a-1)/4)==2){

                           int n=random.nextInt(50)+30;

                           int m=random.nextInt(30)+1;

                           System.out.println(n+"-"+m+"=");

                  }

                 

                  if(a==3||a-4*((a-1)/4)==3){

                           int n=random.nextInt(10)+0;

                           int m=random.nextInt(10)+0;

                           System.out.println(n+"*"+m+"=");

                  }

                 

                  if(a==4||a-4*((a-1)/4)==4){

                           int n=random.nextInt(20)+10;

                           int m=random.nextInt(10)+1;

                           System.out.println(n+"➗"+m+"=");

                  }

                 

          }

}

public static void main(String[] args)

{

          Xitice a=new Xitice();

          a.set();

}

}

 

2.登陆界面

源代码：

import java.awt.Color;

import java.awt.Dimension;

import java.awt.Font;

import java.awt.Toolkit;

import java.awt.event.ActionEvent;

import java.awt.event.ActionListener;

import java.awt.event.KeyEvent;

import java.awt.event.KeyListener;

import javax.swing.JButton;

import javax.swing.JFrame;

import javax.swing.JTextField;

import javax.swing.JLabel;

import javax.swing.JPasswordField;

public class Denglu extends JFrame implements ActionListener{

 

private JLabel usernameLabel;

private JTextField usernameTextField;

private JLabel passwordLabel;

private JTextField passwordField;

private JLabel DengluLabel;

private JTextField DengluField;

private JLabel ramstr;

private JLabel haha;

private JButton bu1;

private JButton bu2;

 

public void add(JFrame frame) {

         

          frame.setTitle("请登录");

          frame.setLayout(null);

         

          //登录名代码

          usernameLabel =new JLabel("登录名");

          usernameLabel.setBounds(60, 40, 70, 30);

          usernameLabel.setFont(new Font("黑体",Font.BOLD,16));

          usernameTextField =new JTextField();

          usernameTextField.setBounds(140,45,120,20);

          usernameTextField.setFont(new Font("宋体",Font.BOLD,16));

          usernameTextField.setHorizontalAlignment(JTextField.CENTER);

         

          //密码代码

          passwordLabel =new JLabel("密码");

          passwordLabel.setBounds(60, 70, 70, 30);

          passwordLabel.setFont(new Font("黑体",Font.BOLD,16));

          passwordField =new JPasswordField();

          passwordField.setBounds(140,75,120,20);

          passwordField.setFont(new Font("宋体",Font.BOLD,16));

          haha =new JLabel("忘记用户名/密码？");

          haha.setForeground(Color.gray);

          haha.setBounds(260, 70, 140, 30);

          haha.setFont(new Font("汉真广标",Font.BOLD,10));

         

          //验证码代码

          DengluLabel =new JLabel("验证码");

          DengluLabel.setBounds(60, 100, 70, 30);

          DengluLabel.setFont(new Font("黑体",Font.BOLD,16));

          DengluField =new JTextField();

          DengluField.setBounds(140,105,60,20);

          DengluField.setFont(new Font("宋体",Font.BOLD,16));

         

          String result = "";

          for(int i = 0 ; i < 6 ; i ++)

          {

                  int intVal = (int)(Math.random() * 26 + 97);

                  result = result + (char)intVal;

          }

          ramstr =new JLabel(result);

          ramstr.setBounds(220, 100, 70, 30);

          ramstr.setFont(new Font("汉真广标",Font.BOLD,16));

         

          //登陆和注册按钮

          bu1=new JButton();

          bu1.setText("登陆");

          bu1.setBackground(Color.BLUE);

          bu1.setForeground(Color.white);

          bu1.setBounds(130, 145, 100, 30);

          getContentPane().add(bu1);

          bu2=new JButton();

          bu2.setText("快速注册");

          bu2.setBounds(120, 185, 120, 30);

          getContentPane().add(bu2);

         

          frame.add(usernameLabel);

          frame.add(usernameTextField);

          frame.add(passwordLabel);

          frame.add(passwordField);

          frame.add(haha);

          frame.add(DengluLabel);

          frame.add(DengluField);

          frame.add(ramstr);

          frame.add(bu1);

          frame.add(bu2);

}

 

public static void main(String []args) {

          JFrame frame =new JFrame("JFrame窗口");

          frame.setDefaultCloseOperation(JFrame.EXIT_ON_CLOSE);

          frame.setSize(400,300);

          Dimension displaySize =Toolkit.getDefaultToolkit().getScreenSize();

          Dimension frameSize= frame.getSize();

          if(frameSize.width>displaySize.width)

                  frameSize.width=displaySize.width;

          if(frameSize.height>displaySize.height)

                  frameSize.height=displaySize.height;

          frame.setLocation((displaySize.width-frameSize.width),(displaySize.height-frameSize.height));

          Denglu Swing=new Denglu();

          Swing.add(frame);

          frame.setVisible(true);

}

}