Question

java 高手进 急急急急急急急急急急1

编写一个程序，检查输入的数字是否为Byte类型。如果次数超出Byte数据类型所能够表示的数的范围，则引发用户自定义异常MyByteSizeException,并显示相应的错误消息

Answer 1

import java.io.BufferedReader;
import java.io.InputStreamReader;

public class Test {
public static void main(String[] args) throws Exception {
BufferedReader br = new BufferedReader(new InputStreamReader(System.in));
try {
String str = br.readLine();
int b = Integer.parseInt(str);
if(b>127 || b<-128) {
throw new MyByteSizeException();
}
} catch (NumberFormatException e) {
System.out.println("输入数字格式错误");
}
}
}
class MyByteSizeException extends Exception {
public MyByteSizeException() {
super("输入的byte错误");
}
}