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java编程作业
发布时间：2023-01-24 14:23:52『壹』 java编程作业，求打救,急.............................
import java.util.Random;
public class StudentsAward {
public static void main(String[] args) {
int[] id = {1,2,3,4,5,6,7,8,9,10};
boolean[] used = new boolean[id.length];
Random r = new Random();
int i ,j=0;
do{
i = r.nextInt(id.length);
if(used[i]){
continue;
}
j++;
System.out.println("三等奖获得者是："+id[i]+"号");
used[i] =true;
}while(j!=3);
do{
i = r.nextInt(id.length);
if(used[i]){
continue;
}
j++;
System.out.println("二等奖获得者是："+id[i]+"号");
used[i] =true;
}while(j!=5);
do{
i = r.nextInt(id.length);
if(used[i]){
continue;
}
j++;
System.out.println("一等奖获得者是："+id[i]+"号");
used[i] =true;
}while(j!=6);
}
}
『贰』 java编程作业
public class Customer {
private String memberName;
private int memberNo;
public Customer(String memberName,int memberNo){
this.memberName = memberName;
this.memberNo = memberNo;
}
public String getMemberName() {
return memberName;
}
public void setMemberName(String memberName) {
this.memberName = memberName;
}
public int getMemberNo() {
return memberNo;
}
public void setMemberNo(int memberNo) {
this.memberNo = memberNo;
}
}
----------------------------------分界线---------------------------------------------------
import java.util.ArrayList;
public class CustManager {
private static ArrayList<Customer> list = new ArrayList<Customer>();
public void addCust(String memberName,int memberNo){
list.add(new Customer(memberName, memberNo));
}
public int searchMemberByName(String memberName){
if(memberName == null || memberName.equals("")){
return 1;
}
for(Customer c : list){
if(memberName.equals(c.getMemberName())){
return c.getMemberNo();
}
}
return 0;
}
}
----------------------------------分界线---------------------------------------------------
public class Test {
public static void main(String[] args) {
CustManager custManager = new CustManager();
custManager.addCust("张三", 1);
custManager.addCust("李四", 2);
custManager.addCust("王五", 3);
custManager.addCust("马六", 4);
System.out.println(custManager.searchMemberByName("马六"));
}
}
『叁』 java编程的作业试题大家帮我解答一下，谢谢了，一共两个题，在下面，请大家一定要帮我解答一下，我不会做
仅供参考，未测试
Question1
packagecom.kidd.atmtest;
importjava.util.Scanner;
publicclassQuestion1{
publicstaticvoidmain(String[]args){
Scannerscanner=newScanner(System.in);
System.out.print("输入基本运费,货重,距离(均为整数，用,分割):");
String[]ss=scanner.next().split(",");
intp=Integer.parseInt(ss[0]);
intw=Integer.parseInt(ss[1]);
ints=Integer.parseInt(ss[2]);
doubled;
if(s<250){
d=0;
}elseif(s<500){
d=0.02;
}elseif(s<1000){
d=0.05;
}elseif(s<2000){
d=0.08;
}else{
d=0.1;
}
System.out.println("总运费f="+(p*w*s*(1-d)));
}
}
Question2
packagecom.kidd.atmtest;
importjava.util.Scanner;
publicclassQuestion2{
publicstaticvoidmain(String[]args){
Scannerscanner=newScanner(System.in);
System.out.print("请输入x:");
intx=scanner.nextInt();
inty;
if(x<0){
y=-1;
}elseif(x>0){
y=1;
}else{
y=0;
}
System.out.println("y="+y);
}
}
Question3
packagecom.kidd.atmtest;
importjava.util.Scanner;
publicclassQuestion3{
publicstaticvoidmain(String[]args){
intindex=0;
Scannerscanner=newScanner(System.in);
booleanend=false;
while(!end){
System.out.print("请输入卡号,密码:");
scanner.next();
index++;
System.out.print("账号或密码错误次数"+index+",");
if(index>=3){
System.out.println("吞卡");
end=true;
}else{
System.out.println("请重新输入.");
}
}
}
}
Question4
packagecom.kidd.atmtest;
importjava.util.Scanner;
publicclassQuestion4{
publicstaticvoidmain(String[]args){
Scannerscanner=newScanner(System.in);
System.out.print("输入一个整数:");
Stringstring=scanner.next();
for(inti=0,k=string.length();i<k;i++){
System.out.println(string.charAt(i));
}
}
}
Question5
packagecom.kidd.atmtest;
importjava.util.Random;
importjava.util.Scanner;
publicclassQuestion5{
publicstaticvoidmain(String[]args){
inti=newRandom().nextInt(40)+60;
booleanend=false;
intn;
intindex=1;
Scannerscanner=newScanner(System.in);
while(!end){
System.out.print("请输入你猜的结果:");
n=scanner.nextInt();
if(n>i){
System.out.println("大了");
index++;
}elseif(n<i){
System.out.println("小了");
index++;
}else{
end=true;
}
}
System.out.print("猜对了,一共猜了"+index+"次,你是");
if(index<5){
System.out.print("天才.");
}else{
System.out.print("笨蛋.");
}
}
}
Question6
packagecom.kidd.atmtest;
importjava.util.Scanner;
publicclassQuestion6{
publicstaticvoidmain(String[]args){
Scannerscanner=newScanner(System.in);
System.out.print("请输入要打印的元素个数:");
intn=scanner.nextInt();
if(n<1){
System.out.println("无输出结果");
}
if(n>=1){
System.out.print("1");
}
if(n>=2){
System.out.print(",2");
}
if(n>2){
intf1=1;
intf2=2;
intsum;
for(inti=3;i<=n;i++){
sum=f1+f2;
System.out.print(","+(f1+f2));
f1=f2;
f2=sum;
}
}
}
}
『肆』 Java编程作业
public static void main(String[] args) {
System.out.println("请输入内容：");
while (true) {
Scanner s = new Scanner(System.in);
String str = s.next();//原始字符串
if(str.equals("!")){
//System.out.println("请重新输入内容：");//继续用这个
break;//退出用这个
}else{
String afterAtr="";//修改后
int num = 0;//修改数量
for (int i = 0; i < str.length(); i++) {
char c = str.charAt(i);
if (Character.isLowerCase(c)) {
afterAtr += Character.toUpperCase(c);
num++;
}else if (Character.isUpperCase(c)) {
afterAtr += Character.toLowerCase(c);
num++;
}else{
afterAtr += c;
}
}
System.out.println("原始内容："+str+";修改后内容:"+afterAtr+";修改数量:"+num);
}
}
}
『伍』 JAVA编程作业
importjava.math.BigDecimal;
importjava.util.Random;
publicclassIncrease{
publicstaticbooleanisPrime(inta){
booleanflag=true;
if(a<2){//素数不小于2
returnfalse;
}else{
for(inti=2;i<=Math.sqrt(a);i++){
if(a%i==0){//若能被整除，则说明不是素数，返回false
flag=false;
break;//跳出循环
}
}
}
returnflag;
}
publicstaticvoidtest1(){
inti,n,k=0;
System.out.println("1-1000内素数");
for(n=3;n<=1000;n++){//3~1000的所有数
i=2;
while(i<n){
if(n%i==0)break;//若能整除说明n不是素数，跳出当前循环
i++;
}
if(i==n){//如果i==n则说明n不能被2~n-1整除，是素数
k++;//统计输出数的个数
System.out.print(i+" ");
if(k%6==0)//每输出5个则换行
System.out.println();
}
}
}
publicstaticvoidtest2()
{
Randomr=newRandom();
System.out.println(r.nextInt(301)-100);
}
publicstaticinttest3(intm,intn){
//辗转相除法
intr;
do{
if(m<n)
{
r=m;
m=n;
n=r;
}
r=m%n;
m=n;
n=r;
}while(r!=0);
returnm;
}
publicstaticdoubletest4(intn){
doublee=1f;
doubletotal=1.0;
for(inti=0;i<n;i++)
{
total/=i+1;
e+=total;
}
BigDecimalb=newBigDecimal(e);
e=b.setScale(4,BigDecimal.ROUND_HALF_UP).doubleValue();//表明四舍五入，保留四位小数
returne;
}
publicstaticvoidmain(String[]args){
//第一题测试
System.out.println(isPrime(131));
test1();
//第二题测试
test2();
//第三题测试
System.out.println("最大公约数为："+test3(1302,19924));
//第四题测试
System.out.println("e="+test4(100));
}
}
运行结果：
true
1-1000内素数
3 5 7 11 13 17
19 23 29 31 37 41
43 47 53 59 61 67
71 73 79 83 89 97
101 103 107 109 113 127
131 137 139 149 151 157
163 167 173 179 181 191
193 197 199 211 223 227
229 233 239 241 251 257
263 269 271 277 281 283
293 307 311 313 317 331
337 347 349 353 359 367
373 379 383 389 397 401
409 419 421 431 433 439
443 449 457 461 463 467
479 487 491 499 503 509
521 523 541 547 557 563
569 571 577 587 593 599
601 607 613 617 619 631
641 643 647 653 659 661
673 677 683 691 701 709
719 727 733 739 743 751
757 761 769 773 787 797
809 811 821 823 827 829
839 853 857 859 863 877
881 883 887 907 911 919
929 937 941 947 953 967
971 977 983 991 997 106
最大公约数为：2
e=2.7183
『陆』 java编程作业：构造方法的重载
我是初学者，我把我写的给你看看，我们可以一起学习交流的啊~
class Point{
double x,y;
Point(double x,double y){
this.x = x;
this.y = y;
}
double getX(){
return x;
}
double getY(){
return y;
}
}
class Circle{
double r;
Point pp;
Circle(double r){
this.r = r;
pp =new Point (0,0);
}
Circle(double r,Point p ){
this.r = r;
this.pp=p;
}
boolean isContain(Point pt){
double a =(pp.x-pt.x)*(pp.x-pt.x)+(pp.y-pt.y)*(pp.y-pt.y);
double b = this.r*this.r;
if(a<b){
return true;
}else{
return false;
}
}
}
public class TestOverLoad{
public static void main (String[] args){
Circle c1=new Circle(1);
Point p=new Point(1,1);
System.out.println(c1.isContain(p));
}
}
『柒』 Java编程作业，急用
以下是源代码和运行结果截图，如果哪里有问题的话可以来找我。
classPet{
intage;
intweight;
publicPet(intage,intweight){
super();
this.age=age;
this.weight=weight;
}
publicvoidshowInfo(){
System.out.println("myweightis"+this.weight+"andmyageis"+this.age);
}
publicintgetWeightInfo(){
returnthis.weight;
}
publicintgetAgeInfo(){
returnthis.age;
}
}
interfaceEatable{
publicabstractvoidbeEatted();//默认为public和abstract
}
classCatextendsPet{
publicCat(intage,intweight){
super(age,weight);
//TODOAuto-generatedconstructorstub
}
privateintcry;
publicvoidshowInfo(){
System.out.println("I'maCat,myweightis"+this.weight+"andmyageis"+this.age);
}
publicintgetWeightInfo(){
returnsuper.getWeightInfo();
}
publicintgetAgeInfo(){
returnsuper.getAgeInfo();
}
}
{
publicDog(intage,intweight){
super(age,weight);
//TODOAuto-generatedconstructorstub
}
privateintcry;
publicvoidshowInfo(){
System.out.println("I'maDog,myweightis"+this.weight+"andmyageis"+this.age);
}
publicintgetWeightInfo(){
returnsuper.getWeightInfo();
}
publicintgetAgeInfo(){
returnsuper.getAgeInfo();
}
publicvoidbeEatted(){
}
}
classFruitimplementsEatable{
publicFruit(Stringcolor,Stringaddress){
super();
this.color=color;
this.address=address;
}
Stringcolor;
Stringaddress;
publicvoidbeEatted(){
System.out.println("I'mbeeneaten!");
}
publicvoidshowInfo(){
System.out.println("mycoloris"+this.color+"andmyaddressis"+this.address);
}
publicStringgetColorInfo(){
returnthis.color;
}
publicStringgetAddressInfo(){
returnthis.address;
}
}
classBananaextendsFruit{
publicBanana(Stringcolor,Stringaddress){
super(color,address);
//TODOAuto-generatedconstructorstub
}
publicvoidbeEatted(){
System.out.println("I'maBanana,I'mbeeneaten!");
}
publicvoidshowInfo(){
System.out.println("I'maBanana,mycoloris"+this.color+"andmyaddressis"+this.address);
}
@Override
publicStringgetColorInfo(){
//TODOAuto-generatedmethodstub
returnthis.getColorInfo();
}
@Override
publicStringgetAddressInfo(){
returnthis.getAddressInfo();
}
}
classAppleextendsFruit{
Stringtype;
publicApple(Stringcolor,Stringaddress,Stringtype){
super(color,address);
this.type=type;
//TODOAuto-generatedconstructorstub
}
publicStringgetType(){
returntype;
}
publicvoidbeEatted(){
System.out.println("I'manapple,I'mbeeneaten!");
}
publicvoidshowInfo(){
System.out.println("I'manApple,mycoloris"+this.color+",myaddressis"+this.address
+"andmytypeis"+type);
}
@Override
publicStringgetColorInfo(){
//TODOAuto-generatedmethodstub
returnthis.getColorInfo();
}
@Override
publicStringgetAddressInfo(){
returnthis.getAddressInfo();
}
}
publicclassPrograms{
publicstaticvoidmain(String[]args){
Catmycat=newCat(10,20);
Dogmydog=newDog(10,24);
Bananamybanana=newBanana("黄色","北京");
Applemyapple=newApple("红色","上海","新品种");
mycat.showInfo();
mydog.showInfo();
mybanana.showInfo();
myapple.showInfo();
mydog.beEatted();
mybanana.beEatted();
myapple.beEatted();
}
}
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