Exceptions and Logging - Java 8 Recipes - page 318

System.out.println("Is th string 123456 longer than
5 chars?:"+
isStringShorterThanFiveCharacters("123456"));
System.out.println("Is th string null longer than
5 chars?:"+
isStringShorterThanFiveCharacters(null));
}
private boolean isStringShorterThanFiveCharacters(String
aString) {
try {
return aString.length() > 5;
} catch (NullPointerException e) {
System.out.println("An Exception Occurred!");
return false;
}
}
How It Works
The try keyword specifies that the enclosed code segment have the potential to raise
an exception. The catch clause is placed at the end of the try clause. Each catch
clause specifies which exception is being caught. If a catch clause is not provided for
a checked exception, the compiler will generate an error. Two possible solutions are to
add a catch clause or to include the exception in the throws clause of the enclosing
method. Any checked exceptions that are thrown but not caught will propagate up the
call stack. If this method doesn't catch the exception, the thread that executed the code
terminates. If the thread terminating is the only thread in the program, it terminates the
execution of the program.
If a try clause needs to catch more than one exception, more than one catch
clause can be specified. For instance, the following try/catch block could be used
for catching both a NumberFormatException and a NullPointerExcep-
tion .
try {
// code here