用JAVA编写一个程序，要求如下：

实现代码如下：

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Student类：

public class Student {

private String name;

private String sex;

private int age;

private double chinese;

private double math;

private double english;

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 int getAge() {

return age;

}

public void setAge(int age) {

this.age = age;

}

public double getChinese() {

return chinese;

}

public void setChinese(double chinese) {

this.chinese = chinese;

}

public double getMath() {

return math;

}

public void setMath(double math) {

this.math = math;

}

public double getEnglish() {

return english;

}

public void setEnglish(double english) {

this.english = english;

}

}

-----------------------------------------------------------------

StudentTest类：（测试类）

import java.util.Scanner;

public class StudentTest {

public static void main(String[] args) {

Student student = new Student();

Scanner sc = new Scanner(System.in);

System.out.println("请输入姓名：");

student.setName(sc.next());

System.out.println("请输入性别：");

student.setSex(sc.next());

System.out.println("请输入年龄：");

student.setAge(sc.nextInt());

System.out.println("请输入语文成绩、数学成绩、英语成绩：");

student.setChinese(sc.nextDouble());

student.setMath(sc.nextDouble());

student.setEnglish(sc.nextDouble());

Double count = student.getChinese()+ student.getMath()+student.getEnglish();

System.out.println("姓名："+student.getName()+" 性别："+student.getSex()+" 年龄："+student.getAge());

System.out.println("总分："+count+" 平均分："+count/3);

}

}

运行结果为：

Java程序代码

import java.awt.*;//计算器实例

import java.awt.event.*;

public class calculator

{

public static void main(String args[])

{

MyWindow my=new MyWindow("计算器");

}

}

class MyWindow extends Frame implements ActionListener

{ StringBuffer m=new StringBuffer();

int p;

TextField tex;

Button b0,b1,b2,b3,b4,b5,b6,b7,b8,b9,jia,jian,cheng,chu,deng,dian,qingling,kaifang;

MyWindow(String s)

{

super(s);

//StringBuffer s2=new StringBuffer();

//String s;

tex=new TextField(18);

b0=new Button(" 0 ");

b1=new Button(" 1 ");

b2=new Button(" 2 ");

b3=new Button(" 3 ");

b4=new Button(" 4 ");

b5=new Button(" 5 ");

b6=new Button(" 6 ");

b7=new Button(" 7 ");

b8=new Button(" 8 ");

b9=new Button(" 9 ");

dian=new Button(" . ");

jia=new Button(" + ");

jian=new Button(" - ");

cheng=new Button(" × ");

chu=new Button(" / ");

deng=new Button(" = ");

qingling=new Button(" 清零 ");

kaifang=new Button(" √ ");

setLayout(new FlowLayout());

add(tex);

add(b0);

add(b1);

add(b2);

add(b3);

add(b4);

add(b5);

add(b6);

add(b7);

add(b8);

add(b9);

add(dian);

add(jia);

add(jian);

add(cheng);

add(chu);

add(kaifang);

add(qingling);

add(deng);

b0.addActionListener(this);

b1.addActionListener(this);

b2.addActionListener(this);

b3.addActionListener(this);

b4.addActionListener(this);

b5.addActionListener(this);

b6.addActionListener(this);

b7.addActionListener(this);

b8.addActionListener(this);

b9.addActionListener(this);

jia.addActionListener(this);

jian.addActionListener(this);

cheng.addActionListener(this);

chu.addActionListener(this);

dian.addActionListener(this);

deng.addActionListener(this);

qingling.addActionListener(this);

kaifang.addActionListener(this);

setBounds(200,200,160,280);

setResizable(false);//不可改变大小

setVisible(true);

validate();

addWindowListener(new WindowAdapter()

{ public void windowClosing(WindowEvent ee)

{ System.exit(0);

}

});

}

public void actionPerformed(ActionEvent e)

{

if(e.getSource()==b0)

{

m=m.append("0");

tex.setText(String.valueOf(m));

}

if(e.getSource()==b1)

{

m=m.append("1"); tex.setText(String.valueOf(m));

}

if(e.getSource()==b2)

{

m=m.append("2"); tex.setText(String.valueOf(m));

}

if(e.getSource()==b3)

{

m=m.append("3"); tex.setText(String.valueOf(m));

}

if(e.getSource()==b4)

{

m=m.append("4"); tex.setText(String.valueOf(m));

}

if(e.getSource()==b5)

{

m=m.append("5"); tex.setText(String.valueOf(m));

}

if(e.getSource()==b6)

{

m=m.append("6"); tex.setText(String.valueOf(m));

}

if(e.getSource()==b7)

{

m=m.append("7"); tex.setText(String.valueOf(m));

}

if(e.getSource()==b8)

{

m=m.append("8"); tex.setText(String.valueOf(m));

}

if(e.getSource()==b9)

{

m=m.append("9"); tex.setText(String.valueOf(m));

}

if(e.getSource()==jia)

{

m=m.append("+"); tex.setText(String.valueOf(m));

}

if(e.getSource()==jian)

{

m=m.append("-"); tex.setText(String.valueOf(m));

}

if(e.getSource()==cheng)

{

m=m.append("*"); tex.setText(String.valueOf(m));

}

if(e.getSource()==chu)

{

m=m.append("/"); tex.setText(String.valueOf(m));

}

if(e.getSource()==dian)

{

m=m.append("."); tex.setText(String.valueOf(m));

}

String mm=String.valueOf(m);

int p1=mm.indexOf("+");

int p2=mm.indexOf("-");

int p3=mm.indexOf("*");

int p4=mm.indexOf("/");

if(p1!=-1)

{

p=p1;

}

else if(p3!=-1)

{

p=p3;

}

else if(p2!=-1)

{

p=p2;

}

else if(p4!=-1)

{

p=p4;

}

if(e.getSource()==deng)

{

String m1=mm.substring(0,p);

String m2=mm.substring(p+1);

String ch=mm.substring(p,p+1);

//System.out.println(m1);

//System.out.println(m2);

//System.out.println(ch);

if(ch.equals("+"))

{

float n1=Float.parseFloat(m1);

float n2=Float.parseFloat(m2);

float sum=n1+n2;

String su=String.valueOf(sum);

tex.setText(su);

}

if(ch.equals("-"))

{

float n1=Float.parseFloat(m1);

float n2=Float.parseFloat(m2);

float sum=n1-n2;

String su=String.valueOf(sum);

tex.setText(su);

}

if(ch.equals("*"))

{

float n1=Float.parseFloat(m1);

float n2=Float.parseFloat(m2);

float sum=n1*n2;

String su=String.valueOf(sum);

tex.setText(su);

}

if(ch.equals("/"))

{

float n1=Float.parseFloat(m1);

float n2=Float.parseFloat(m2);

float sum=n1/n2;

String su=String.valueOf(sum);

tex.setText(su);

}

}

if(e.getSource()==qingling)

{StringBuffer kk=new StringBuffer();

m=kk;

tex.setText("0");

// System.out.println(mm);

}

if(e.getSource()==kaifang)

{

String t=tex.getText();

float num=Float.parseFloat(t);

double nub=Math.sqrt(num);

tex.setText(String.valueOf(nub));

}

}

}

Java求程序代码

按照你的要求编写的Java程序如下

import java.util.Scanner;

public class S{

public static void main(String[] args){

int n=5;

int[] a=new int[n];

System.out.print("请输入"+n+"个正整数:");

Scanner sc=new Scanner(System.in);

for(int i=0;in;i++){

a[i]=sc.nextInt();

}

System.out.print("其中的偶数为:");

for(int i=0;in;i++){

if(a[i]%2==0){

System.out.print(a[i]+" ");

}

}

}

}

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