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//從鍵盤讀取

package Demo;
import java.util.*;
import java.io.*;
public class loop {
    public static void main(String[] args) throws IOException{
        BufferedReader f = new BufferedReader(new InputStreamReader(System.in));
        String r = f.readLine();
        System.out.println(r);
    }
}

package Demo;
import java.util.*;
import java.io.*;
public class loop {
    public static void main(String[] args) throws IOException{
        BufferedReader f = new BufferedReader(new InputStreamReader(System.in));
        String r;
//        System.out.println(r);
        do{
            System.out.println("Input.....");
            r = f.readLine();
            System.out.println(r);
        }while (!r.equals("end"));
    }
}

package Demo;
import java.util.*;
import java.io.*;
public class loop {
    public static void main(String[] args) throws IOException{
        //使用字節(jié)流讀取數(shù)據(jù)
        byte[] bytesdata =  new byte[100];
        System.out.println("Input...");
        try{
            System.in.read(bytesdata);
        }catch (IOException e){
            e.printStackTrace();
        }
        System.out.println("your intput is ");
        for (int i = 0; i < bytesdata.length; i++){
            System.out.print((char)bytesdata[i]);
        }
    }
}