java中，怎样实现键盘输入？

Answer 1

java---由键盘输入数据,字符串-BufferedReader的用法

范例一:有键盘输入一串字符串,

import java.io.*;

public class bufferedreader{

public static void main(String args[]) throws IOException

{

String mystring;

BufferedReader buf=new BufferedReader(new InputStreamReader(System.in));

System.out.println("input a string");

mystring=buf.readLine();

System.out.println("string="+mystring);

}

}

范例2:有键盘输入数据:

import java.io.*;

public class bufferedreader

{

public static void main(String args[]) throws IOException

{

String mystring;

int myint;

BufferedReader buf=new BufferedReader(new InputStreamReader(System.in));

System.out.println("input an integer");

mystring=buf.readLine();

myint=Integer.parseInt(mystring);

System.out.println("the integer is="+myint);

}

}

范例3:由键盘输入两个整数,并且求和:

import java.io.*;

public class bufferedreader

{

public static void main(String args[]) throws IOException

{

String mystring1,mystring2;

int myint1,myint2;

BufferedReader buf=new BufferedReader(new InputStreamReader(System.in));

System.out.println("please input the first number");

mystring1=buf.readLine();

myint1=Integer.parseInt(mystring1);

System.out.println("please input the second number");

mystring2=buf.readLine();

myint2=Integer.parseInt(mystring2);

System.out.println(myint1+"+"+myint2+"="+(myint1+myint2));

}

}

Answer 2

BufferedReader bw = new BufferedReader(new InputStreamReader(System.in));
String str=bw.ReadLine();

Answer 3

import java.util.*;

Scanner sc = new Scanner(System.in);
String str = sc.nextLine();

参考资料：http://www.javabiz.cn

Answer 4

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Answer 5

System.in.prinln();