异常抛出问题！！

[charmlin]

import java.io.*;
class MyException extends Exception{
private String reason;
public MyException(String r){
reason=r;
}
public String getReason(){
return(reason);
}
}
class Excp{
private String s;
public Excp(String ss)throws MyException{
s=ss;
if(s=="XYZ"){
throw new MyException("This is a XYZ");
}
}
}
class Test_Excp{
public static void main(String args[])throws Exception{

byte buffer[]=new byte[255];
System.out.println("Plz input s1:");
System.in.read(buffer,0,255);
String s1=new String(buffer);
try{
Excp e1=new Excp(s1);
}
catch(MyException e){
System.out.println("ddfd");
}
}
}

[jason_kou]

不喜欢猜问题。

[charmlin]

运行后没有捕捉到异常MyException，怎么回事

[zhj92lxs]

s=="XYZ"
换成"XYZ".equals(s)

[charmlin]

还有一个问题，怎么不能把main后面的抛出删掉呢，函数里不是已经捕捉了吗？

[charmlin]

[Quote=引用 3 楼 zhj92lxs 的回复:]
s=="XYZ"
换成"XYZ".equals(s)
[/Quote]
换了还是没用

[charmlin]

大仙们！up

[blazingfire]

import java.io.*;

class MyException extends Exception {
	private String reason;

	public MyException(String r) {
		reason = r;
	}

	public String getReason() {
		return (reason);
	}
}

class Excp {
	private String s;

	public Excp(String ss) throws MyException {
		s = ss;
		if (s.equals("XYZ")) {
			throw new MyException("This is a XYZ");
		}
	}
}

public class Test_Excp {
	public static void main(String args[]) throws Exception {
		System.out.println("Plz input s1:");
		BufferedReader in = new BufferedReader(new InputStreamReader(System.in));
		String s1 = in.readLine();
		try {
			Excp e1 = new Excp(s1);
		} catch (MyException e) {
			System.out.println("ddfd");
		}
	}
}

[charmlin]

[Quote=引用 7 楼 blazingfire 的回复:]
BufferedReader in = new BufferedReader(new InputStreamReader(System.in));
String s1 = in.readLine();
[/Quote]
为什么要用这个啊

[charmlin]

还有怎么不能把main后面的抛出删掉呢，函数里不是已经捕捉了吗？

[blazingfire]

用标准输入流录入的地方要改要好一些。或者改成如下:
.....
System.in.read(buffer,0,255);
String s1=new String(buffer).trim(); //那个Buffer含有无效的字符
.................

[blazingfire]

in.readLine();时会抛出IOException异常的

[charmlin]

恩，明白了