Rethrowing of exception in java has improved starting from Java 7. We can now specify more specific exceptions using throws keyword. Before java 7:
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public void someMethod(String testStr) throws Exception { try { if (testStr.equals("SomeThing")) { throw new UserException1(); } else { throw new UserException2(); } } catch (Exception e) { //Do some processing.. throw e; } } |
Catching multiple exceptions in java is now very easy starting from Java 7. Before java 7 we used to write the below code for catching multiple exceptions
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try{ //Some Statements }catch(Exception1 e1 |){ //log statements }catch(Exception2 e2){ //log statements }catch(Exception3 e3){ //log statements } |
Throws keyword in java is used to declare exceptions that can be thrown by the method. Throws keyword can be used to throw multiple exception. syntax: 1. Throws single exception [crayon-68ead080c4c
Exceptions in java can be thrown using the “throw” keyword. The throw statements requires a object to throw. This object needs to be a throwable object. Syntax: [crayon-68ead080c4ed2101
In this post we will see the exception handling using the try catch finally in java. 1. Use of Try – Catch Block A exception in java can be handled using a Try and Catch block. Lets see a sim
If you have a try catch finally block in java, the return statement behaves differently. You may think 1. If I have a return in try then will finally block get called? 2. What if a exception occurs
We will see the differences between String, StringBuffer and StringBuilder. The main differences are related to thread safe nature and performance. Difference String StringBuffer and StringBuilder
In this post we will see String.format java examples. Format method in String returns a formatted string using the specified format string and arguments.
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public static String format(String format,Object... args) |
ArrayList can be emptied or cleared using either clear or removeAll method. Both these methods differ in performance. If you see the code for both these methods you will get to know which method is
To clear ArrayList in java we have 2 ways 1. void clear() – Clears all the elements that are present in the ArrayList 2. boolean removeAll(Collection<?> c) – Remov