写一个JAVA小程序。

发布网友发布时间：2023-09-29 09:32

共5个回答

热心网友时间：2024-12-01 09:19

package test;

import java.util.ArrayList;
import java.util.Iterator;
import java.util.List;
import java.util.Scanner;

public class TSceen {

private static Integer getInt() {
Integer i = null;
Scanner scanner = new Scanner(System.in);
System.out.println("请输入整数长度不多于5位");
while (i == null) {
try {
int temp = new Integer(scanner.nextInt());
if (temp >= 100000 || temp <= -100000) {
System.out.println("请输入整数长度大于5位");
continue;
}
i = temp;
}catch (Exception e) {
System.out.println("请输入整数");
scanner = new Scanner(System.in);
}
}
return i;
}

private static void toChange(Integer i) {
String si = i.toString();
char str[] = si.toCharArray();
int len =  str.length;
for (int j = 0; j < len; j++) {
switch (len - j) {
case 5:
System.out.println("万位：" + str[j]);
break;
case 4:
System.out.println("千位：" + str[j]);
break;
case 3:
System.out.println("百位：" + str[j]);
break;
case 2:
System.out.println("十位：" + str[j]);
break;
case 1:
System.out.println("个位：" + str[j]);
break;
}
}
System.out.println("参数: "+ i + "是" + len + "位数");
}

private static void outList() {
List<String> list = new ArrayList<String>();
Scanner scanner = new Scanner(System.in);//ScreenReader.readLine();
String str = null;
for ( ; ; ) {
str = scanner.next();
if (str.equals("#end")){
       break;
       }
        if (list.contains(str)) {
            System.out.println("重复请重新输入：");
            continue;
        }
       list.add(str);
}
Iterator<String> iter = list.iterator();
while(iter.hasNext()) {
System.out.println(iter.next());
}
}
public static void main(String[] args) {
Integer i = getInt();
toChange(i);
outList();
}
}

热心网友时间：2024-12-01 09:20

代码仅供参考！第七题

import org.apache.log4j.Logger;
public class Test001 {

    private Logger logger = Logger.getLogger(Test001.class);

    public void printNum(Integer num){
try{
    if(num==null){
    logger.error("参数有误...");
    return;
}
String nStr = num.toString();
if(nStr.length()>5){
    logger.error("参数过长...");
    return;
}
logger.info("输入的是："+nStr.length()+"位数。");
Integer it = 0;
for(int i=nStr.length()-1;i>=0;i--){
    it++;
    if(it==1){
logger.info("个位："+nStr.charAt(i));
    }
    if(it==2){
logger.info("十位："+nStr.charAt(i));
    }
    if(it==3){
logger.info("百位："+nStr.charAt(i));
    }
    if(it==4){
logger.info("千位："+nStr.charAt(i));
    }
    if(it==5){
logger.info("万位："+nStr.charAt(i));
    }
}
} catch( Exception e ){
    logger.error("error : ", e);
}
    }

    public static void main(String[] args) {
Test001 t001 = new Test001();
t001.printNum(123456);
    }
}

热心网友时间：2024-12-01 09:20

package com.test;

import java.util.ArrayList;
import java.util.Scanner;

public class Test005 {

public static void main(String[] args) {
ArrayList<String> list = new ArrayList<>();
Scanner scanner = new Scanner(System.in);
while(true) {
String input = scanner.next();
if("#end".equals(input)) {
break;
}else if(list.contains(input)){
System.out.println("已经包含，请重新输入：");
}else {
list.add(input);
}
}
for(String a : list) {
System.out.println(a);
}
}
}

追问可以用readLine调用的方法写一下吗？

热心网友时间：2024-12-01 09:21

刚刚的回答都不采纳还答个毛线。。

热心网友时间：2024-12-01 09:21

你需要哪一题？追问第七题