readwrite.java

java基础教程以及代码 java base document and code

//  输入输出演示

import java.io.*;

public class ReadWrite
{
	public static void main(String [] args) throws IOException
	{
		BufferedReader key=new BufferedReader(new InputStreamReader(System.in));
		String st=key.readLine();
		int num=Integer.parseInt(st);
		System.out.println("它的两倍是："+num*2);
		System.out.println("个位是: "+st.charAt(st.length()-1));

	}
}