Java-方法重写中的声明异常（throws）原则

package cn.lixunhuan.oo1;

import java.io.FileNotFoundException;
import java.io.IOException;
import java.text.ParseException;

public class TestRangofExrends {
}

class A {
public void method() throws IOException {
}
}

class B extends A {
public void method() throws FileNotFoundException {
}
}

class C extends A {
public void method()
}

class D extends A {
public void method() throws Exception {
}
}

class E extends A {
public void method() throws IOException, FileNotFoundException {
}
}

class F extends A {
public void method() throws IOException, ParseException {
}
}