java中控制台输入

[永远的菜鸟]

java中怎么用system.in方法能够从控制台不停的输入...
怎么判断年份是否为闰年....要求从控制台输入,当输入不为正整数时，提示请输入错误，请输入正整数，然后能继续从控制台输入，知道输入为正整数为止...

[simimasaiya]

楼主，这些问题，把任何一本java教材的前两章看看都能写，除非楼主没有任何基础

[旷逍遥]

BufferedReader br=new XX(system.in) ;
br.readline()

[小绵羊]

while(读入的数不是整数){
//执行你的逻辑
}

[小绵羊]

while(读入的数不是整数){
//应该是继续读
}

[qybao]

for example

import java.util.*;
public class Test {
    public static void main(String[] args) throws Throwable {
        Scanner sc = new Scanner(System.in);
        String buf;
        int year;
        GregorianCalendar c = new GregorianCalendar();
        while (true) {
            System.out.print("请输入年([yyyy]格式):");
            buf = sc.nextLine();
            try {
                year = Integer.parseInt(buf);
                if (year < 0) {throw new Exception("负数");}
                System.out.println(c.isLeapYear(year) ? "闰年" : "不是闰年");
                System.out.print("是否继续？(y/n):");
                buf = sc.nextLine();
                if ("y".equalsIgnoreCase(buf)) break;
            } catch (Exception e) {
                System.out.println("输入错误，请重输");
            }
        }
    }
}

[龙腾冰]

for example

package Char12;

import java.io.*;
import java.text.*;
import java.util.*;

class InputData{
	private BufferedReader buf = null;
	public int count =1;
	public InputData(){
		this.buf = new BufferedReader(new InputStreamReader(System.in));
	}
	public String getInfo(){
		String temp = null;
		if(this.count>1){
			this.count =1;
			System.out.print("请你输入第"+this.count+++"个日期:");
		}else{
			System.out.print("请你输入第"+this.count+++"个数字:");
		}
		try {
			temp = this.buf.readLine();
		} catch (IOException e) {
			e.printStackTrace();
		}
		return temp;
	}
	public int getInt(){
		int temp = 0;
		String str = null;
		boolean flag = true;
		while(flag){
			str = this.getInfo();
			if(str.matches("^\\d+{1}quot;)){
				temp = Integer.parseInt(str);
				flag = false;
			}else{
				System.out.println("输入的数据必须是数据，请重新输入!");
				this.count = count-1;
			}
		}
		return temp;
	}
	public Date getDate(){
		Date d = null;
		boolean flag = true;
		String str = null;
		while(flag){
			str = this.getInfo();
			if(str.matches("^\\d{4}-\\d{2}-\\d{2}{1}quot;)){
				SimpleDateFormat sdf = new SimpleDateFormat("yyyy-MM-dd");
				try {
					d = sdf.parse(str);
				} catch (ParseException e) {
					e.printStackTrace();
				}
				flag = false;
			}else{
				System.out.println("输入的数据必须是日期，请重新输入!");
			}
		}
		return d;
	}
};
public class BufferedReaderDemo02 {
	public static void main(String args[]){
		int i = 0 ;
		int j = 0 ;
		InputData input = new InputData();
		i = input.getInt();
		j = input.getInt();
		System.out.println(i+"+"+j+"="+(i+j));
		Date d = null;
		d = input.getDate();
		DateFormat sdf = DateFormat.getDateTimeInstance(DateFormat.YEAR_FIELD,DateFormat.ERA_FIELD,new Locale("zh","Cn"));
		System.out.println(sdf.format(d));
	}
}

[ningmenggogo]

this.buf = new BufferedReader(new InputStreamReader(System.in));
和Scanner sc = new Scanner(System.in);
的区别是？？