String in Java | Java String | How to use String in Java | Java Full Course | #5 смотреть онлайн

String Introduction in Java
String in Java
String in Java are Objects that are backed internally by a char array. Since arrays are immutable(cannot grow), Strings are immutable as well. Whenever a change to a String is made, an entirely new String is created.
Whenever a String Object is created as a literal, the object will be created in String constant pool. This allows JVM to optimize the initialization of String literal.
The string can also be declared using new operator i.e. dynamically allocated. In case of String are dynamically allocated they are assigned a new memory location in heap. This string will not be added to String constant pool
Java full course for beginners

Java String Introduction
Strings are an incredibly common type of data in computers. This page introduces the basics of Java strings: chars, +, length(), and substring().

A Java string is a series of characters gathered together, like the word "Hello", or the phrase "practice makes perfect". Create a string in the code by writing its chars out between double quotes.
String + Concatenation

Tthe + (plus) operator between strings puts them together to make a new, bigger string. The bigger string is just the chars of the first string put together with the chars of the second string.

String a = "kit" + "ten"; // a is "kitten"

Strings are not just made of the letters a-z. Chars can be punctuation and other miscellelaneous chars. For example in the string "hi ", the 3rd char is a space. This all works with strings stored in variables too.
String Length

The "length" of a string is just the number of chars in it. So "hi" is length 2 and "Hello" is length 5. The length() method on a string returns its length

The chars in a string are identified by "index" numbers. In "Hello" the leftmost char (H) is at index 0, the next char (e) is at index 1, and so on. The index of the last char is always one less than the length. In this case the length is 5 and 'o' is at index 4. Put another way, the chars in a string are at indexes 0, 1, 2, .. up through length-1. We'll use the index numbers to slice and dice strings with substring()
String Introduction in java, strings, strings in java, string, java string methods, string class, java strings tutorial, java strings tutorial with examples, java strings tutorial for beginners, java string tutorial, strings programs in java, strings introduction in java, stirng tutorials in java, string tutorials for beginners, java string class