Can try be without catch in java

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Can we have try without catch block in java

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.

When you execute above program, you will get following output:

What happens when you have return statement in try block:

If you have return statement in try block, still finally block executes.

When you execute above program, you will get following output:

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:

When you execute above program, you will get following output:

What if exception is thrown in try block

If exception is thrown in try block, still finally block executes.

When you execute above program, you will get following output:

As you can see that even if code threw NullPointerException, still finally block got executed.
You can go through top 50 core java interview questions for more such questions.

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How to use try without catch in Java

We can use try without a catch or finally block in Java. But, you have to use a finally block.

The finally block always executes when the try block exits. finally block is executed even if an exception occurs. finally block is used for cleanup code. For example, if you open a file in the try block, you can close it inside finally.

If JVM exits, this block may not execute.

Example of try without catch block:

Let’s try it with an example:

class Main  public static void main(String[] args)  try  System.out.println("Inside try block.."); > finally  System.out.println("Inside finally.."); > > >

This program will work. If you run this program, it will print the below output:

Inside try block.. Inside finally..

Exception inside try block:

Let’s try to throw an exception inside the try block.

class Main  public static void main(String[] args)  try  throw new NullPointerException(); > finally  System.out.println("Inside finally.."); > > >

We are throwing a NullPointerException inside the try block. It will print:

Inside finally.. Exception in thread "main" java.lang.NullPointerException at Main.main(Main.java:4) Process finished with exit code 1

Without catch block and with throws:

Let’s take a look at the below program:

class Main  private static void dummyMethod() throws NullPointerException  try  System.out.println("Inside dummyMethod try. "); throw new NullPointerException(); > finally  System.out.println("Inside finally.."); > > public static void main(String[] args)  try  System.out.println("Inside main try. "); dummyMethod(); > finally  System.out.println("Inside main finally. "); > > >

In this example, I am calling a method dummyMethod that can throw a NullPointerException. Inside this method, we are throsing NullPointerException in the try block.

Both uses only try with only finally block and without catch block.

If you run this program, it will print the below output:

Inside main try... Inside dummyMethod try... Inside finally.. Inside main finally... Exception in thread "main" java.lang.NullPointerException at Main.dummyMethod(Main.java:6) at Main.main(Main.java:15)

As you can see, it prints the statements in both finally blocks.

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Can try be without catch in java