C:\Java\workspace\ng\src\clazz\In.java
package clazz;
import java.io.BufferedReader;
import java.io.IOException;
import java.io.InputStreamReader;
public class In {
public static void main(String[] args) throws NumberFormatException, IOException {
//关键 抛出异常
int i = 0;
int j = 0;
BufferedReader br = null;
System.out.println("请输入值1:");
br = new BufferedReader(new InputStreamReader(System.in));//关键 从键盘读入
i = Integer.parseInt(br.readLine()); //关键 将值付给i
System.out.println("请输入值2:");
br = new BufferedReader(new InputStreamReader(System.in)); //关键
j = Integer.parseInt(br.readLine()); //关键
System.out.print(String.valueOf(i));
System.out.print(" + ");
System.out.print(String.valueOf(j));
System.out.print(" = ");
System.out.println(String.valueOf(i+j));
System.out.println("==========================");
}
}