This is a complete guide to Java String, StringBuilder, and StringBuffer methods/APIs. The source code examples of this guide are well tested with our local development environment and you can use these examples as bug-free. You can learn more on Complete Core Java Developer Guide.

In this guide, you will learn basic concepts, APIs/methods, coding, programs and all String operations with examples.

Java String API Guide

1. Java String Class API Guide
   • The String Constructors  
   • String charAt(int index)
   • String codePointAt(int index)
   • String codePointBefore(int index)
   • String compareTo(String anotherString)
   • String compareToIgnoreCase(String str)
   • String concat(String str)
   • String contains(CharSequence s)
   • String contentEquals()
   • String endsWith(String suffix)
   • String equals() and equalsIgnoreCase()
   • String getBytes()
   • String getChars()
   • String hashCode()
   • String indexOf()
   • String intern()
   • String lastIndexOf()
   • String length()
   • String regionMatches()
   • String replace()
   • String replaceAll(String regex, String replacement)
   • String replaceFirst(String regex, String replacement)
   • String split() methods
   • String startsWith() methods
   • String subSequence(int beginIndex, int endIndex)
   • String substring()  methods
   • String toCharArray()
   • String toLowerCase() methods
   • String toString()
   • String toUpperCase() methods
   • String trim()
   • String valueOf()

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2. Guide to Java String Constant Pool
   
3. Guide to String Best Practices in Java (Best Practice)
   
4. String Special Operations with Examples
   
5. String Comparison Methods with Examples
   
6. String Methods for Character Extraction
   
7. String Searching Methods with Examples
   
8. String Modifying Methods with Examples
   
9. Java StringBuffer Class API Guide
10. Java StringBuilder Class API Guide