java编程题,java编程题补种未成活胡杨

本文目录一览：

• 1、java入门编程题：某班有十位同学，请顺序输入十位同学的学号，保存在数组中，并输出所有同学的学号？
• 2、java编程题目
• 3、有关java编程题目？
• 4、JAVA编程题

java入门编程题：某班有十位同学，请顺序输入十位同学的学号，保存在数组中，并输出所有同学的学号？

import java.util.Scanner;

public class Students {

public static void main(String[] args) {

Scanner in = new Scanner(System.in);

String[] students=new String[10];

String No=null;

for (int i = 0; i 10 ; i++) {

System.out.println(“请输入学号：”);

No=in.next();

students[i]=No;

}

System.out.println(“学号是：”);

for (String a:students) {

System.out.print(a+” “);

}

}

}

java编程题目

这不都说的很清楚了么。。。。。。。。

自己写吧，也没啥难度。

是完全不知道这个题目再说什么么？

package spring5.source;

import java.awt.Button;

import java.awt.FlowLayout;

import java.awt.TextField;

import java.awt.event.ActionEvent;

import java.awt.event.ActionListener;

import java.awt.event.KeyEvent;

import java.awt.event.KeyListener;

import javax.swing.JFrame;

public class D extends JFrame {

public static void main(String[] args) {

D d = new D();

d.setDefaultCloseOperation(JFrame.EXIT_ON_CLOSE);

d.setSize(500, 500);

d.setLayout(new FlowLayout());

TextField t1 = new TextField();

TextField t2 = new TextField();

Button b = new Button(“OK”);

b.addActionListener(new ActionListener() {

@Override

public void actionPerformed(ActionEvent e) {

String v1 = t1.getText();

try {

int n = Integer.parseInt(v1);

Double d = Math.pow(n, 2);

t2.setText(String.valueOf(d.intValue()));

} catch (Exception e2) {

e2.printStackTrace();

}

}

});

t1.addKeyListener(new KeyListener() {

@Override

public void keyTyped(KeyEvent e) {

}

@Override

public void keyReleased(KeyEvent e) {

}

@Override

public void keyPressed(KeyEvent e) {

if (e.getKeyChar() == KeyEvent.VK_ENTER) {

String v1 = t1.getText();

try {

int n = Integer.parseInt(v1);

Double d = Math.pow(n, 2);

t2.setText(String.valueOf(d.intValue()));

} catch (Exception e2) {

e2.printStackTrace();

}

}

}

});

// KeyListener key_Listener = ;

d.add(t1);

d.add(t2);

d.add(b);

d.setVisible(true);

}

}

少了一个 d.setDefaultCloseOperation(JFrame.EXIT_ON_CLOSE); 关闭窗口的

有关java编程题目？

按照题目要求编写的圆,圆锥和测试类的Java程序如下

Test.java文件内容如下

class Circle{

private double r;

private String color;

public Circle(double r){

this.r=r;

}

public double area(){

return Math.PI*r*r;

}

public double perimeter(){

return Math.PI*2*r;

}

public double getR(){

return this.r;

}

public void setR(double r){

this.r=r;

}

public String getColor(){

return this.color;

}

public void setColor(String color){

this.color=color;

}

public String toString(){

return “圆的半径为”+r+”,颜色为”+color;

}

}

class Cone{

private Circle c;

private double h;

private String color;

public Cone(Circle c,double h){

this.c=c;

this.h=h;

}

public double volume(){

return 1.0/3*c.area()*h;

}

public Circle getCircle(){

return this.c;

}

public void setCircle(Circle c){

this.c=c;

}

public double getH(){

return this.h;

}

public void setH(double h){

this.h=h;

}

public String getColor(){

return this.color;

}

public void setColor(String color){

this.color=color;

}

public String toString(){

return “圆锥的底面积为”+c.area()+”,高为”+h+”,颜色为”+color;

}

}

public class Test{

public static void main(String[] args){

Circle circle1=new Circle(2.5);

circle1.setColor(“红色”);

System.out.println(circle1.toString());

System.out.println(“圆的面积为”+circle1.area());

System.out.println(“圆的周长为”+circle1.perimeter());

Cone circlar1=new Cone(circle1,2.7);

circlar1.setColor(“蓝色”);

System.out.println(circlar1.toString());

System.out.println(“圆锥的体积为”+circlar1.volume());

}

}

JAVA编程题

//圆类Circle

import java.util.Scanner;

public class Circle {

private double radius;

public double getRadius() {

return radius;

}

public void setRadius(double radius) {

this.radius = radius;

}

//无参构造函数

public Circle(){

this.radius=0;

}

//带参构造函数

public Circle(double r ){

this.radius=r;

}

//获取面积

public double getArea(){

double r=this.radius;

double area=r*r*3.14;

return area;

}

//获取周长

public double getPerimeter(){

double perimeter=this.radius*2*3.14;

return perimeter;

}

//打印圆的信息

public void show(){

System.out.println(“请输入圆的半径”);

Scanner sc=new Scanner(System.in);

this.setRadius(sc.nextInt());

System.out.println(“圆的半径”+this.getRadius());

System.out.println(“圆的面积”+this.getArea());

System.out.println(“圆的周长”+this.getPerimeter());

}

}

//圆柱类

public class Cylinder extends Circle {

//圆柱高

private double height;

public double getHeight() {

return height;

}

public void setHeight(double height) {

this.height = height;

}

//构造方法

public Cylinder (double r, double h){

super();

this.height=h;

this.setRadius(r);

}

public double getVolume( ) {

double volume=this.getArea()*this.height;

return volume;

}

//求体积

public void showVolume(){

System.out.println(“圆柱的体积”+this.getVolume());

}

}

//主程序入口

public class Test {

/**

* @param args

*/

public static void main(String[] args) {

// TODO Auto-generated method stub

Circle circle=new Circle();

circle.show();

Cylinder cylinder=new Cylinder(2.0,8.5);

cylinder.showVolume();

}

}

PS：注释写的很详尽了，求采纳