大一java代码阅读题,大一java题库及答案

（大一java题目） 多线程

import java.awt.*;

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import javax.swing.*;

import java.awt.event.*;

import java.util.*;

import java.text.*;

public class Win extends JFrame implements Runnable

{

public static void main(String[] args)

{

new Win();

}

Win()

{

setLayout(new GridLayout(2,2));

add(new JLabel("当前时间："));

add(timetxt=new JTextField(25));

add(new JLabel("当前数字："));

add(numtxt=new JTextField(25));

// setSize(400,300);

// setDefaultCloseOperation(JFrame.EXIT_ON_CLOSE);

pack();

setResizable(false);

setLocationRelativeTo(null);

addWindowListener(new WindowAdapter()

{

public void windowClosing(WindowEvent e)

{

exit=true;

dispose();

System.exit(0);

}

});

new Thread(this).start();

new Thread(new Runnable()

{

public void run()

{

while(!exit)

{

try

{

Thread.sleep(2000);

n++;

numtxt.setText(String.valueOf(n));

n%=10;

}

catch(Exception ex)

{

}

}

}

private int n=0;

}).start();

setVisible(true);

}

public void run()

{

while(!exit)

{

try

{

timetxt.setText(sdf.format(new Date()));

Thread.sleep(1000);

}

catch(Exception ex)

{

}

}

}

private boolean exit=false;

private JTextField timetxt,numtxt;

private final SimpleDateFormat sdf=new SimpleDateFormat("H:m:s");

}

一个JAVA题~大一书上的

so easy...

public class Account{

private String accNo;//账号；

private float leftAmount;//余额

private float rate;//年利率

public void setAccNo(String accNo){this.accNo = accNo;}

public String getAccNo(){return accNo;}

public void setLeftAmount(float leftAmount){this.leftAmount = leftAmount;}

public float getLeftAmount(){return leftAmount;}

public void setRate(float rate){this.rate = rate;}

public float getRate(){return rate;}

public void cunkuan(float amount){this.leftAmount += amount;}//存款

public void qukuan(float amount){this.leftAmount -= amount;}//取款

}

public class Jijie extends Account{

}

public class Xinyong extends Account{

private float limitAmount;//信用卡的透支额限制

}

大一编程入门java，这道题怎么做呢？

Employee .java

public class Employee {

private int empId;

private String empName;

private String empsex;

public int getEmpId() {

return empId;

}

public void setEmpId(int empId) {

this.empId = empId;

}

public String getEmpName() {

return empName;

}

public void setEmpName(String empName) {

this.empName = empName;

}

public String getEmpsex() {

return empsex;

}

public void setEmpsex(String empsex) {

this.empsex = empsex;

}

}

PartTimeEmployee.java

public class PartTimeEmployee extends Employee{

private double hourlyPay;

public double getHourlyPay() {

return hourlyPay;

}

public void setHourlyPay(double hourlyPay) {

this.hourlyPay = hourlyPay;

}

}

测试类Test.java

public class Test{

public static void main(String[] args) {

PartTimeEmployee pe=new PartTimeEmployee();

pe.setEmpId(1);

pe.setEmpName("莉莉");

pe.setEmpsex("女");

pe.setHourlyPay(50.0);

System.out.println("雇员编号："+pe.getEmpId());

System.out.println("雇员姓名："+pe.getEmpName());

System.out.println("雇员性别："+pe.getEmpsex());

System.out.println("每小时工资："+pe.getHourlyPay());

}

}

Java大一的习题，请大神帮忙看看

/**

* 学生类

* @author LuHuan

*

*/

public class Student {

private String id; //学号

private String name; //姓名

private int age; //年龄

private int score; //成绩

//声明一个空的构造方法

public Student(){}

//声明一个全部属性的构造方法

public Student(String id, String name, int age, int score) {

super();

this.id = id;

this.name = name;

this.age = age;

this.score = score;

}

@Override

public String toString() {

return "学号=" + id + ", 姓名=" + name + ", 年龄=" + age + ", 成绩=" + score;

}

public void show() {

System.out.println(toString());

}

public String getId() {

return id;

}

public void setId(String id) {

this.id = id;

}

public String getName() {

return name;

}

public void setName(String name) {

this.name = name;

}

public int getAge() {

return age;

}

//在这里设置年龄的范围

public void setAge(int age) {

if(age = 0  age = 100)

this.age = age;

else 

System.out.println("年龄（取值介于0-100之间)");

}

public int getScore() {

return score;

}

//在这里设置成绩的范围

public void setScore(int score) {

if(score = 0  score = 100)

this.score = score;

else 

System.out.println("成绩(取值介于0-100之间)");

}

测试类：

/**

* 测试类

* @author LuHuan

*

*/

public class Test {

public static void main(String[] args) {

Student s = new Student("10001", "黄达", 20, 99);

s.show(); //输出：学号=10001, 姓名=黄达, 年龄=20, 成绩=99

}

}

大一JAVA题。求解

第1个文件：Person.java

public class Person{

private String name;

private String sex;

private String age;

private String country;

public void eat(){

System.out.println("Person吃饭");

}

public void sleep(){

System.out.println("Person睡觉");

}

public void work(){

System.out.println("Person工作");

}

public String getName() {

return name;

}

public void setName(String name) {

this.name = name;

}

public String getSex() {

return sex;

}

public void setSex(String sex) {

this.sex = sex;

}

public String getAge() {

return age;

}

public void setAge(String age) {

this.age = age;

}

public String getCountry() {

return country;

}

public void setCountry(String country) {

this.country = country;

}

}

第2个文件：Student.java

public class Student extends Person{

private String school;

private String number;

public void work(){

System.out.println("学生在认真学习");

}

public static void main(String[] args){

Student s = new Student();

s.setName("张无忌 ");

s.setSex("男 ");

s.setAge("22 ");

s.setCountry("元朝 ");

s.school="明教 ";

s.number="1 ";

s.work();

s.sleep();

s.eat();

System.out.println(s.getName() + s.getSex() + s.getAge() + s.getCountry() + s.school + s.number);

}

public String getSchool() {

return school;

}

public void setSchool(String school) {

this.school = school;

}

public String getNumber() {

return number;

}

public void setNumber(String number) {

this.number = number;

}

}

第3个文件：Worker.java

public class Worker extends Person{

private String unit;

private String working_age;

public void work(){

System.out.println("工人努力工作赚钱");

}

public static void main(String[] args){

Worker w = new Worker();

w.setName("赵敏 ");

w.setSex("女 ");

w.setAge("20 ");

w.setCountry("元朝 ");

w.unit="绍敏郡主 ";

w.working_age="3 ";

w.work();

w.sleep();

w.eat();

System.out.println(w.getName() + w.getSex() + w.getAge() + w.getCountry() + w.unit + w.working_age);

}

public String getUnit() {

return unit;

}

public void setUnit(String unit) {

this.unit = unit;

}

public String getWorking_age() {

return working_age;

}

public void setWorking_age(String working_age) {

this.working_age = working_age;

}

}

第4个文件：Cadre.java

public class Cadre extends Student{

private String position;

public void meeting(){

System.out.println("学生干部在开会");

}

public static void main(String[] args){

Cadre c = new Cadre();

c.setName("周芷若 ");

c.setSex("女 ");

c.setAge("23 ");

c.setCountry("元朝 ");

c.setSchool("峨眉 ");

c.setNumber("3 ");

c.position="峨眉派掌门 ";

c.meeting();

c.work();

c.sleep();

c.eat();

System.out.println(c.getName() + c.getSex() + c.getAge() + c.getCountry() + c.getSchool() + c.getNumber() + c.position);

}

public String getPosition() {

return position;

}

public void setPosition(String position) {

this.position = position;

}

}

大一Java作业题

首先回答您的do-while的问题，while中是条件为true的时候继续执行do里面的代码，当为false的时候结束执行。下面是您的问题的一种解决办法，忘采纳。

import java.util.Scanner;

public class JuiceVendingCashFlow {

public static int total = 0;

public static int customernum =0;

public static double income = 0;

public double income (double w,double t){

income += (w/100)*3.5+t*1.5;

total++;

customernum++;

return income;

}

public static void main(String[] args) throws Exception {

JuiceVendingCashFlow f= new JuiceVendingCashFlow();

double weight = 0;

System.out.println("Customer"+"#"+ ++customernum+" welcome!");

do {

System.out.print("how much juice are you after?");

try{

Scanner s = new Scanner(System.in);

weight = s.nextDouble();

if(weight0) {

throw new Exception();

}

} catch (Exception e) {

System.out.println("OVER");

}

if (weight=0) {

System.out.println("how many toppings would you like?");

Scanner b = new Scanner(System.in);

double topping = b.nextDouble();

f.income(weight, topping);

}

} while (weight=0);

System.out.println(income+" "+ --customernum);

}

}

此方法写的仓促其中如果topping为负值的时候会出现异常，您可以写一个异常抛出来解决问题。

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