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public class test {\x0d\x0a public static void main(String[] args) {\x0d\x0a //定义人名数组\x0d\x0a String [] name = {"张三","李四","王五","八神庵","不知火舞","大蛇","景天","唐雪见","李逍遥","赵灵儿"};\x0d\x0a//随机生成数组下标、\x0d\x0a int num = (int)(Math.random() * 1000);\x0d\x0a//对生成的随机数进行判断,如果小于数组下标,就跳出循环\x0d\x0awhile (numname.length-1) {\x0d\x0a if (num
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回答于 2022-11-16
[Main.java]
import java.util.*;
public class Main{
private boolean flag==false;
private int count;
private boolean stop=false;
HashMapInteger,String name=new HashMapInteger,String();
public static void main(String[] args){
Scanner sc=new Scanner(System.in);
String strs=sc.next();
String str=strs.split("|")[0];
if(str.equals("投票")flag==falsestop==false){
System.out.println("投票成功");
flag=true;
count++;
name.put(count,strs.split("|")[1]);
if(count==1000){
stop=true;
}
}else if(str.equals("投票")flag==true||str.equals("投票")stop==true){
System.out.println("投票失败,已截止或已投票");
}
for(int i=0;i=count;i++){
System.out.print(name.get(i));
}
System.out.println("已经投票数:"+count);
}
}
GUI界面或者其他的东西自行完成,我只是给个思路。
//都是从新手过来的,以下代码供参考
//1.
public class BankAccount {
private static String acctnum;
private static double money;
private static void showAcct() {
System.out.println("账号为: " + acctnum);
}
private static void showMoney() {
System.out.println("余额为: " + money);
}
public BankAccount(String acc, double m) {
this.acctnum = acc;
this.money = m;
}
public static void main(String[] args) {
BankAccount ba = new BankAccount("626600018888", 5000.00);
ba.showAcct();
ba.showMoney();
}
}
//2.
public class Triangle {
private static float a;
private static float b;
private static float c;
public Triangle(float a, float b, float c) {
this.a = a;
this.b = b;
this.c = c;
}
public static boolean judgeTriangle(float a, float b, float c) {
if ((a Math.abs(b - c) a b + c)
(b Math.abs(a - c) b a + c)
(c Math.abs(a - b) c a + b))
return true;
else
return false;
}
public float getCircumference() {
return this.a + this.b + this.c;
}
}
//3.
public class TestTriangle {
public static void main(String[] args) {
Triangle t = new Triangle(5.3f,7.8f,9.3f);
if(t.judgeTriangle(5.3f,7.8f,9.3f)){
System.out.print("能够成三角形,周长为: ");
System.out.printf("%9.2f",t.getCircumference());}
else
System.out.println("不能构成三角形");
}
}
运行代码
具体的代码如下:
import java.util.HashMap;
public class SearchDemo {
public HashMapInteger,Integer countMap(char[] arr){
HashMap countMap = new HashMapInteger, Integer();
for (int i = 0; i arr.length; i++) {
if(!countMap.containsKey(arr[i])){
countMap.put(arr[i],1);
}else{
int value = (int)countMap.get(arr[i]) + 1;
countMap.put(arr[i],value);
}
}
return countMap;
}
public static void main(String[] args) {
char[] arr={'A','1','R','!','e','','A','5','A','g','#','D'};
int count = new SearchDemo().countMap(arr).get('A');
System.out.println("其中'A'字符的个数是:" + count);
}
}
运行结果
最简单的java代码肯定就是这个了,如下:
public class MyFirstApp
{
public static void main(String[] args)
{
System.out.print("Hello world");
}
}
“hello world”就是应该是所有学java的新手看的第一个代码了。如果是零基础的新手朋友们可以来我们的java实验班试听,有免费的试听课程帮助学习java必备基础知识,有助教老师为零基础的人提供个人学习方案,学习完成后有考评团进行专业测试,帮助测评学员是否适合继续学习java,15天内免费帮助来报名体验实验班的新手快速入门java,更好的学习java!
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文件代码如下
package user.java.test;
import java.io.Serializable;
public class Student implements Serializable{
private static final long serialVersionUID = 1L;
private String no;
private String name;
private double score;
public Student(){}
public Student(String no,String name,double score){
this.no=no;
this.name=name;
this.score=score;
}
public String getNo(){ return no;}
public void setNo(String no){ this.no=no;}
public String getName(){ return name;}
public void setName(String name){ this.name=name;}
public double getScore(){ return score;}
public void setScore(double score){ this.score=score;}
public String toString(){
return "学号:"+no+",姓名:"+name+",成绩:"+score;
}
public static double getAvg(Student[] sArray){
double sum=0,avg;
for(int i=0;isArray.length;i++){
sum=sum+sArray[i].getScore();
}
avg=sum/sArray.length;
return avg;
}
}
Test.java文件代码如下
package user.java.test;
public class Test{
public static void main(String[] args){
Student[] sArray=new Student[5];
sArray[0]=new Student("001","张三",89.5);
sArray[1]=new Student("002","李四",82.5);
sArray[2]=new Student("003","王五",93);
sArray[3]=new Student("004","赵六",73.5);
sArray[4]=new Student("005","孙七",66);
System.out.println("这些学生的平均分:"+Student.getAvg(sArray));
for(int i=0;isArray.length;i++){
System.out.println(sArray[i].toString());
}
}
}