String

toString()in String
Substring in Java
StringTokenizer in Java
Difference between String concatenation operator (+) and concat() Method
Difference Between hasMoreElements() and hasMoreTokens() in StringTokenizer

String Methods

Convert String to Integer – parseInt()
String replace() Method
String replaceAll() Method
String charAt() Method
String equals() Method
String length() Method
String contains() Method
String equalsIgnoreCase() Method

String isEmpty() Method
String toLowerCase() Method
String toUpperCase() Method
String trim() Method
String startsWith() Method

String concat() Method
String toCharArray() Method
String endsWith() Method

String compareTo() Method

Problems Based on String

How to Convert char to String in Java