java题目(java题目题库)

帮我说下,java题目(java题目题库)
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狗屎味的小仙女

2024-11-26 22:35:06

java题目,求助大神了

publicclassDay31{

publicstaticvoidmain(String[]args){

Animalch=newChicken("喔喔","芦花鸡","虫子","打鸣");

Animaldu=newChicken("嘎嘎","斑嘴鸭","小皮没鱼虾","游泳饥带");

AnimalAction.script(ch);

AnimalAction.script(du);

}

}

//父类

abstractclassAnimal{

protectedStringname,type,hobby,skill;;

protectedAnimal(Stringname,Stringtype,Stringhobby,Stringskill){

this.name=name;

this.type=type;

this.hobby=hobby;

this.skill=skill;

};

protectedvoidnameFun(){

System.out.println("我叫:"+name+"是一只"燃肢纳+type+"!");

}

protectedvoidhobbyFun(){

System.out.println("我喜欢吃:"+hobby+"!");

}

protectedvoidskillFun(){

System.out.println("我会:"+skill+"!");

}

}

//子类1鸡

classChickenextendsAnimal{

public?Chicken(Stringname,Stringtype,Stringhobby,Stringskill){

super(name,type,hobby,skill);

}

}

//子类2鸭

classDuckextendsAnimal{

publicDuck(Stringname,Stringtype,Stringhobby,Stringskill){

super(name,type,hobby,skill);

}

}

//调用类;

class?AnimalAction{

publicstaticvoidscript(Animalan){

an.nameFun();

an.hobbyFun();

an.skillFun();

}

}

有关java编程题目?

按照题目要求源晌编写的圆,圆锥和测试类的Java程序如下

Test.java文件内容如下

classCircle{

privatedoubler;

privateStringcolor;

publicCircle(doubler){

this.r=r;

}

publicdoublearea(){

returnMath.PI*r*r;

}

publicdoubleperimeter(){

returnMath.PI*2*r;

}

publicdoublegetR(){

returnthis.r;

}

publicvoidsetR(doubler){

this.r=r;

}

publicStringgetColor(){

returnthis.color;

}

publicvoidsetColor(Stringcolor){

this.color=color;

}

publicStringtoString(){

return"圆的半径为"+r+",颜色为"+color;

}

}

classCone{

privateCirclec;

privatedoubleh;

privateStringcolor;

publicCone(Circlec,doubleh){

this.c=c;

this.h=h;

}

publicdoublevolume(){

return1.0/3*c.area()*h;

}

publicCirclegetCircle(){

returnthis.c;

}

publicvoidsetCircle(Circlec){

this.c=c;

}

publicdoublegetH(){

returnthis.h;

}

publicvoidsetH(doubleh){

this.h=h;

}

publicStringgetColor(){

returnthis.color;

}

publicvoidsetColor(Stringcolor){

this.color=color;

}

publicStringtoString(){

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

}

}

publicclassTest{

publicstaticvoidmain(String[]args){

Circlecircle1=newCircle(2.5);

circle1.setColor("红色");

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

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

System.out.println("圆的周雹段锋长为"+circle1.perimeter());

Conecirclar1=newCone(circle1,2.7);

circlar1.setColor("蓝色");

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

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

}

}

java练习题求完整代码

按照题目要求编写的用javaBean规范设计的学生类Student的Java程序如下

需要创建user.java.test包,把Student.java文件和Test.java文件放入包中,编译Student.java文件并且编译运行Test.java文件得到运行结果

Student.java文件扮租代码如下

packageuser.java.test;

importjava.io.Serializable;

publicclassStudentimplementsSerializable{

privatestaticfinallongserialVersionUID=1L;

privateStringno;

privateStringname;

privatedoublescore;

publicStudent(){}

publicStudent(Stringno,Stringname,doublescore){

this.no=no;

this.name=name;

this.score=score;

}

publicStringgetNo(){returnno;}

publicvoidsetNo(Stringno){this.no=no;}

publicStringgetName(){returnname;}

publicvoidsetName(Stringname){this.name=name;}

publicdoublegetScore(){returnscore;}

publicvoidsetScore(doublescore){this.score=score;}

publicStringtoString(){

return"学号:"+no+",姓名:"+name+",成绩:"+score;

}

publicstaticdoublegetAvg(Student[]sArray){

doublesum=0,avg;

for(inti=0;isArray.length;i++){

sum=sum+sArray[i].getScore();

}

avg=sum/sArray.length;

returnavg;

}

}

Test.java文件代码如下

packageuser.java.test;

publicclassTest{

publicstaticvoidmain(String[]args){

Student[]sArray=newStudent[5];

sArray[0]=newStudent("001","张三",89.5);

sArray[1]=newStudent("002","李四",82.5);

sArray[2]=newStudent("003","王五",93);

sArray[3]=newStudent("004"皮缺和,"赵六",73.5);

sArray[4]=newStudent("005","燃盯孙七",66);

System.out.println("这些学生的平均分:"+Student.getAvg(sArray));

for(inti=0;isArray.length;i++){

System.out.println(sArray[i].toString());

}

}

}

java课程设计题目及代码是什么?

java课程设计题目及代码分别是:

1、题目:计算器。设计内容是设计一个图形界面(GUI)的计算器应用程序,完成简单的算术芹此蔽运算。

设计要求是设计的计算器应用程序可以完成家法、减法、乘法、扒旦除法和取余运算。且有小数点、正负号、求倒数、退格和清零功能。

2、代码:

数字按钮NumberButton类如下:

importjava.awt.

importjava.awt.event.

importjavax.swing.

publicclassNumberButtonextendsButton.

{

intnumber.

publicNumberButton(intnumber).

?{

super(""+number).

this.number=number.

setForeground(Color.blue).

}

publicintgetNumber().

{

returnnumber;

}

}

其它java课程设计题目及代码是:

题目:华容道。编写一个按钮的子类,使用该子类创建的对象代表华容道中的人物。通过焦点事件控制人物颜色,当人物获得焦点时颜色为蓝色,当失去焦点时颜色为灰色。

通过键盘事件和鼠标事件来实现曹操、关羽等人物的移动。当人物上发生鼠标事件或键盘事件时,如果鼠标指针的位置是在人物的下方(也就是组件的下半部分)或按下键盘的“↓“键,该人物向下移动。向左、向右和向上的移动原理类似。

代码是:

Stringname[]={"曹操","关羽","张","刘","嫌州马","许","兵","兵","兵","兵"}.

for(inti=0;iname.length;i++).

{

person[i]=newPerson(i,name[i]).

person[i].addKeyListener(this).

person[i].addMouseListener(this).

//???person[i].addFocusListener(newPerson).

add(person[i]).

}

person[0].setBounds(104,54,100,100).

person[1].setBounds(104,154,100,50).

person[2].setBounds(54,154,50,100).

person[3].setBounds(204,154,50,100).

person[4].setBounds(54,54,50,100).

person[5].setBounds(204,54,50,100);

person[6].setBounds(54,254,50,50);

person[7].setBounds(204,254,50,50);

person[8].setBounds(104,204,50,50);

person[9].setBounds(154,204,50,50);

几道JAVA题目,求好心人给下答案,感激不尽

1、publicstaticvoidmain(String[]args)

2、publicfinallstatic

3、3

4、抽象类

5、implements

6、类:一个包含属性、方法,使用class关键字定义

??对象:创建对象必须使用new关键字,对象其实在内锋森存中存储的是类的引用地址。

7、try是可能发生异常的内容;

??catch是发生异常握宏后要处理的代码;

??finally是始终执行的,比如关闭资源等。

8、银皮亩

public?class?Demo?{

//小明今年12岁,他母亲比他大20岁。编程计算多少年后他母亲的年龄是小明的2倍。

public?static?void?main(String[]?args)?{

System.out.println(getYeah());

}

public?static?int?getYeah(){

int?xmAge?=?12,mqAge?=?20,yeah?=?0;

while(true){

if(mqAge?/?2?==?xmAge){

return?yeah;

}

mqAge++;

yeah++;

}

}

}

9、

public?class?Demo?{

public?static?void?main(String[]?args)?{

new?Thread(new?Piao()).start();

new?Thread(new?Piao()).start();

new?Thread(new?Piao()).start();

new?Thread(new?Piao()).start();

}

}

class?Piao?implements?Runnable{

private?static?int?piao?=?1;

public??void?run(){

while(true){

synchronized(Piao.class){

if(piao??100){

System.exit(0);

}

System.out.println(Thread.currentThread().getName()+"出票:"?+?piao?+?"号");

piao++;

}

}

}

}