Java

Characters and Strings in Java

Characters and Strings in Java

In Java, characters, and strings are used to represent text. 

Characters 
A character in Java is a single letter, number, or symbol represented by the char data type. Char values are enclosed in single quotes like this: 
Example: 

char c = 'a'; 

One can use escape sequences in Java to use a new line, tab etc. 
Example: 

char newLine = '\n'; 

Strings 
A string in Java is a sequence of characters represented by the String class and is enclosed in double quotes. 
Example: 

String a1 = "Hello"; 
String a2 = "World"; 
String a3 = a1 + ", " + a2 + "!"; // a3 = "Hello, World!" 
String name = "Jane Doed"; 
String firstName = name.substring(0,4); // firstName = "Jane" 
String lastName = name.substring(5); // lastName = "Do" 
String sentence = "The quick brown fox"; 
sentence = sentence.replace("brown", "red"); // sentence = "The quick red fox" 
​​​

Java also provides several built-in methods that can be used to manipulate strings, such as length, trim, toUpperCase, toLowerCase and etc. 
 

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