大二java课程设计题目和代码,大二java课程设计题目和代码和报告
求助大神如何用Java写出这两个题目的代码？
第一题
package baidu;
public class Student {
protected String name;
protected int age;
public Student(String name, int age) {
this.name = name;
this.age = age;
}
public void show(){
System.out.println("name = " + name);
System.out.println("age = " + age);
}
}
---------------------------------
package baidu;
public class Undergraduate extends Student {
private String degree;
public Undergraduate(String name, int age, String degree) {
super(name, age);
this.degree = degree;
}
public void show(){
System.out.println("name = " + name);
System.out.println("age = " + age);
System.out.println("degree = " + degree);
}
}
------------------------
package baidu;
public class TestRun {
public static void main(String[] args) {
Student s = new Student("singi",12);
s.show();
Undergraduate ug = new Undergraduate("lily",23,"本科");
ug.show();
}
}
输出:
name = singi
age = 12
name = lily
age = 23
degree = 本科
第二题:
package baidu;
public class Man {
String name;
public Man(String name) {
this.name = name;
}
public void business(){
System.out.println("在方法内输出谈生意");
}
}
----------------
package baidu;
public class SuperMan extends Man {
String name;
public SuperMan(String name, String name1) {
super(name);
this.name = name1;
}
@Override
public void business() {
System.out.println("在方法内输出谈几个亿的大单子");
}
public void fly(){
System.out.println("在方法内输出超人不会飞");
}
}
------------------
package baidu;
public class TestMan {
public static void main(String[] args) {
Man m = new Man("singi");
System.out.println(m.name);
m.business();
SuperMan sm = new SuperMan("lily","xiaoming");
System.out.println(sm.name);
sm.business();
sm.fly();
}
}
输出:
singi
在方法内输出谈生意
xiaoming
在方法内输出谈几个亿的大单子
在方法内输出超人不会飞
一题大二java编程题目，求帮助，有图
import java.awt.BorderLayout;
import java.awt.FlowLayout;
import java.awt.event.ActionEvent;
import java.awt.event.ActionListener;
import javax.swing.JButton;
import javax.swing.JFrame;
import javax.swing.JLabel;
import javax.swing.JPanel;
import javax.swing.JScrollPane;
import javax.swing.JTextArea;
import javax.swing.JTextField;
public class NewFrame {
private JFrame frame;
private JTextArea jt;
private JTextField jname;
private JTextField jnum;
private JTextField jshow;
private JLabel lname;
private JLabel lnum;
private JButton show;
private JButton quit;
public NewFrame(){
frame=new JFrame("添加组件的窗口");
jt=new JTextArea(10,20);
jname=new JTextField(10);
jnum=new JTextField(10);
jshow=new JTextField(9);
lname=new JLabel("用户名:");
lnum=new JLabel("电话:");
show=new JButton("显示");
quit=new JButton("退出");
init();
showMe();
addEventHandler();
}
private void addEventHandler() {
show.addActionListener(new ActionListener(){
public void actionPerformed(ActionEvent e) {
jt.setText("用户名:"+jname.getText()+"\n"+"电话:"+jnum.getText());
jshow.setText("你按下了显示按钮!");
}
});
quit.addActionListener(new ActionListener(){
public void actionPerformed(ActionEvent e) {
System.exit(0);
}
});
}
public void init(){
frame.setLayout(new BorderLayout());
JScrollPane north=new JScrollPane(jt);
JPanel center = new JPanel();
center.setLayout(new FlowLayout());
JPanel south=new JPanel();
south.setLayout(new FlowLayout());
center.add(lname);
center.add(jname);
center.add(lnum);
center.add(jnum);
south.add(jshow);
south.add(show);
south.add(quit);
frame.add(north,BorderLayout.NORTH);
frame.add(center,BorderLayout.CENTER);
frame.add(south,BorderLayout.SOUTH);
}
public void showMe(){
frame.setLocation(500, 300);
frame.setSize(350,280);
frame.setResizable(false);//不能拖动大小
frame.setVisible(true);
frame.setDefaultCloseOperation(JFrame.EXIT_ON_CLOSE);
}
public static void main(String[] args) {
new NewFrame().showMe();
}
}
Java程序设计题目
3， 文件名：Three.java
public class Three {
public static void main(String[] args) {
Student stu = new Student("Zhang San", true, (short)12);
System.out.println("Student name: " + stu.name);
System.out.println("Student is a male?: " + stu.sex);
System.out.println("Student's age: " + stu.age);
stu.work();
stu.study();
Teacher teacher = new Teacher();
teacher.learnMoney();
}
}
abstract class Person{//抽象类Person
protected String name;
protected boolean sex;
protected short age;
protected abstract void work(); //work抽象方法
}
interface Learnmoney{//Learnmoney接口
public void learnMoney();
}
interface Study{//Study接口
public void study();
}
class Student extends Person implements Study{//Student类
public void work() {
System.out.println("学生的工作是努力学习");
}
public Student(String name, boolean sex, short age){
super.name = name;
super.sex = sex;
super.age = age;
}
public void study() {
System.out.println("学生正在学习");
}
}
class Teacher extends Person implements Learnmoney{
public void work() {
System.out.println("教师的工作是教书育人");;
}
public void learnMoney() {
System.out.println("教师正在赚钱");
}
}
class Docotor extends Person implements Learnmoney{
public void work() {
System.out.println("医生的职责是救死扶伤");
}
public void learnMoney() {
System.out.println("医生正在赚钱");
}
}
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4文件名：Four.java
public class Four {
public static void main(String[] args) {
Rectangle r = new Rectangle(3, 4);
System.out.println("Area is : " + r.area());
System.out.println("Circle is: " + r.circle());
}
}
class Rectangle{
private double width;
private double height;
public Rectangle(double width, double height){
this.width = width;
this.height = height;
}
public double circle(){//求周长
return (width + height) * 2;
}
public double area(){//求面积
return width * height;
}
}
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5Five.java
public class Five {
public static void main(String[] args) {
AImpl a = new AImpl();
a.paint();
}
}
interface A {
public int method1(int x);
public int method2(int x, int y);
}
class AImpl implements A{
public int method1(int x) {
return (int)Math.pow(x, 5);
}
public int method2(int x, int y) {
return x y? x: y;
}
public void paint(){
int result1 = method1(2);
int result2 = method2(2, 8);
System.out.println("method1(2) = " + result1);
System.out.println("method2(2, 8) = " + result2);
}
}
-----------------------------测试
method1(2) = 32
method2(2, 8) = 8
