How to Declare and Initialize a String in Java
There are two main ways to create Java Strings. One is by creating a String literal (see top line in picture below). The other is to explicitly create a new Object in memory (See second line below). I will avoid going into detail about how these differ as it involves discussing aliasing and how Java saves memory. Note: Unlike some other programming languages, in Java Strings must be enclosed in double quotes. Single quotes are used for chars, a primitive data type.
Important Methods of a Java String
String Concatenation
To concatenate Strings (join to Strings), the easiest way to do it is just use the + operator as shown in the example below
tring abcAsVariable ="abc";
String defAsVariable ="def";
String abcdef = "abc" + "def";
You could achieve the same concatenation by using the variables as shown in the next line.
String abcdef = defAsVariable + abcAsVariable ;
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