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
while(i
if(n%i==0)break;//若能整除说明n不是素数，跳出当前循环
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+"\t");
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;
if(m
r=m%n;
}while(r!=0);
returnm;
publicstaticdoubletest4(intn){
doublee=1f;
doubletotal=1.0;
for(inti=0;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：
1-1000内素数
357111317
192329313741
434753596167
717379838997
101103107109113127
131137139149151157
163167173179181191
193197199211223227
229233239241251257
263269271277281283
293307311313317331
337347349353359367
373379383389397401
409419421431433439
443449457461463467
479487491499503509
521523541547557563
569571577587593599
601607613617619631
641643647653659661
673677683691701709
719727733739743751
757761769773787797
809811821823827829
839853857859863877
881883887907911919
929937941947953967
971977983991997106
最大公约数为：2
e=2.7183
更多追问追答
只有第一题吗？
所有的都有了啊。。。你看main函数！！
能分开写吗？
而且这运行有5个错误
嗯，这是怎么回事？
上面的错误是你自己改我的代码的弄的。四条那个是空格，你看我的代码哪有空格。下面的错误是文件名和类名不一致。。。
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 list = new ArrayList();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"));自己看书了做吧，很简单的这个多简单写好得怎么发给你呢需要数据库的吗？还是用swing做图形界面的？
