Wednesday, 16 November 2016

Catching multiple exception types in Java 7

In Java 7 and later, a single catch block can handle more than one type of exception. This feature helps reduce code duplication.
Consider the following example which we use prior to Java 7, which contains duplicate code in each of the catch blocks:
try{
// do some thing
}
catch (IOException ex) {
     ex.printStackTrace();
}
catch (SQLException ex) {
     ex.printStackTrace();
}

The following example, which is valid in Java  7 and later, eliminates the duplicated code:
try{
// do some thing
}
catch (IOException | SQLException ex) {
    ex.printStackTrace();
}


The catch clause specifies the types of exceptions that the block can handle, and each exception type is separated with a vertical bar (|).

1 comment:

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