Why String is Immutable?

What is mean by immutable object/class? Assume we have a below class A as mutable: Class A{ int i = 10; int j = 20; A a = new A(); } a.i = 30; a.j = 40; Changing state of objects, so A is mutable. Immutable: once object is created, we cannot change the content of the object. String str = "Venu" -> We ca not change the state of str because string is immutable str.concate("gopal)...

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STLC (Software Testing Life Cycle)

Software Testing Life Cycle: Below is the summary of STLC along with Entry and Exit Criteria: Following phases are involved in STLC: Requirement Analysis Test Planning Test case development Test Environment setup Test Execution Test Cycle closure 1. Requirement Analysis: Entry Criteria:  Requirements Document available (both functional and non functional) Application architectural document available Activity: Analyze business functionality...

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BufferedReader vs Scanner

Difference between BufferedReader and Scanner: It can parse the user input and read an int, short, byte, float, long and double apart from String. On the other hand, BufferedReader can only read String in Java. BuffredReader has a significantly large buffer (8KB) than Scanner (1KB), which means if you are reading long String from a file, you should use BufferedReader but for short input and input other than String, you can use Scanner class. BufferedReader...

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