String methods – substring

As its name says, it is used to get the substring from the any String.

It has 2 types of implementations.

  1. String substring(int beginIndex)
  2. String substring(int beginIndex, int endIndex)

Let’s look at them one by on with examples.

String substring(int beginIndex):

It is used to return the substring starting from the specified index(beginIndex) till the end of the string.

e.g. Suppose, we have a string “”Hello World”. If we want to return a substring “world” then we have to do the following shown in the example below.

Output: Returns the substring – World
Note : Method throws IndexOutOfBoundsException If the beginIndex is less than zero or greater than the length of String.

 

String substring(int beginIndex, int endIndex):

Returns the substring starting from the given index(beginIndex) till the specified index(endIndex).

Output: Returns the substring – lo Wo
Note : Method throws IndexOutOfBoundsException, If the beginIndex is less than zero OR beginIndex > endIndex OR endIndex is greater than the length of String.
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Shekhar Sharma

Shekhar Sharma

Shekhar Sharma is founder of testingpool.com. This website is his window to the world. He believes that ,"Knowledge increases by sharing but not by saving".

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  1. August 7, 2015

    […] String substring(int beginIndex) […]