Java String.contains() to check presence of a sequence of string inside main string

String.contains() search for matching sequnce of string
Syntax

String1.contains(String2)

The output is boolean ( true or false )

Here are some examples with output.

String my_str1="Welcome to plus2net";
System.out.println(my_str1.contains("2")); // true
System.out.println(my_str1.contains("net")); // true
System.out.println(my_str1.contains("plus2net")); // true
System.out.println(my_str1.contains("co")); // true
System.out.println(my_str1.contains("no")); // false

Searching for @ and . inside email address.

String my_str1="userid@example.com";
System.out.println(my_str1.contains("@")); // true
System.out.println(my_str1.contains(".")); // true
System.out.println(my_str1.contains(" ")); // false

All String functions

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string.contains()

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