These exceptions can be handled by creating an exception handler. Try, catch, finally and resources are the components that help to create an efficient and effective exception handler, they rescue a program from being crashed.

Try Statement

• This is the very first step to construct an exception handler. It encloses all critical statements which might trigger an exception.
• Try block monitors each & every critical statement. If a constraint gets violated, then it would throw an exception object.
• A Try can have multiple catch statements.
• It always associates with either a catch statement or a finally statement, forming a pair such as try-catch or try-finally.

try{

//  code here

}

Catch Statement

• A catch statement is an exception handler that handles the exception object thrown by try statement.
• Thrown exception object is caught by an appropriate catch block.
• It accepts an argument which represents an exception object of the specific type.
• A single catch statement can handle multiple exceptions
• No code can be put in between try and catch statement. Meaning, once a try block ends up, immediately after that, a catch or finally block should be there in a program.
• If a try block has multiple catch statements, then the compiler would choose that catch block which keeps the appropriate type of that exception object. catch (ExceptionType objName){ // code }