继承中的Default constructor cannot handle exception type问题，求大神指点

[cuojue306]

package it.cast.day21_2930;

import java.io.BufferedReader;
import java.io.IOException;
import java.io.Reader;

public class MyBufferReaderDemo2 extends BufferedReader {
public MyBufferReaderDemo2(Reader in) {
super(in);
// TODO Auto-generated constructor stub
}

public String readLine() throws IOException {
return super.readLine();
}
}


package it.cast.day21_2930;

import java.io.FileReader;

public class MyBufferReaderDemoTest2 {
MyBufferReaderDemo2 mbf2 = new MyBufferReaderDemo2(new FileReader("a.txt"));
[color=#FF0000]//在这里会提示：Default constructor cannot handle exception type FileNotFoundException thrown by implicit super constructor. Must define an explicit constructor 请问怎么解决[/color]

}

[Usher丶AckMan]

你只是new了一个对象,并没有调用方法,所以CLASS会调用默认的构造方法,默认的构造方法是没有参数的,所以出错了。 new完对象,应该用对象去调用方法.

[xiaovhao]

你应该是找不到a.txt才会报这个错吧,你在MyBufferReaderDemoTest2 这个类里加上try,catch或者直接抛出异常,应该就好了