Throws and Inheritance - Java Language Basics

Java examples for Language Basics:throw

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Introduction

Any exception thrown by the subclass must be the same as the superclass or a subclass of that exception. 

void readFields() throws IOException { 
}

If this method is in a superclass and you override the method, this would not be allowed in the subclass: 

void readFiles() throws SQLException { 
}

SQLException is not a subclass of IOException, so this code will not compile.

But the method could throw FileNotFoundException, because that's a subclass of IOException.


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