Yes, we can have try without catch block by using finally block.
You can use try with finally. As you know finally block always executes even if you have exception or return statement in try block except in case of System.exit().
Lets understand with the help of example.
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package org.arpit.java2blog; public class TryWithoutCatchMain { public static void main(String args[]) { try { System.out.println("Executing try block"); } finally { System.out.println("Executing finally block"); } } } |
When you execute above program, you will get following output:
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Executing try block Executing finally block |
What happens when you have return statement in try block:
If you have return statement in try block, still finally block executes.
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package org.arpit.java2blog; public class TryWithoutCatchMain { public static void main(String args[]) { System.out.println(print()); } public static String print() { try { System.out.println("Executing try block"); return "Return from try block"; } finally { System.out.println("Executing finally block"); } } } |
When you execute above program, you will get following output:
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Executing try block Executing finally block Return from try block |
What happens if you have return statement in finally block too:
It overrides whatever is returned by try block. Lets understand with the help of example:
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package org.arpit.java2blog; public class TryWithoutCatchMain { public static void main(String args[]) { System.out.println(print()); } public static String print() { try { System.out.println("Executing try block"); return "Return from try block"; } finally { System.out.println("Executing finally block"); return "Return from finally block"; } } } |
When you execute above program, you will get following output:
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Executing try block Executing finally block Return from finally block |
What if exception is thrown in try block :
If exception is thrown in try block, still finally block executes.
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package org.arpit.java2blog; public class TryWithoutCatchMain { public static void main(String args[]) { System.out.println(print()); } public static int print() { try { throw new NullPointerException(); } finally { System.out.println("Executing finally block"); } } } |
When you execute above program, you will get following output:
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Executing finally block Exception in thread "main" java.lang.NullPointerException at org.arpit.java2blog.TryWithoutCatchMain.print(TryWithoutCatchMain.java:14) at org.arpit.java2blog.TryWithoutCatchMain.main(TryWithoutCatchMain.java:7) |
You can go through top 50 core java interview questions for more such questions.
