Array | multidimensional Array Exapmle | String in java | == and equals method different |
Array | multidimensional Array Exapmle | String in java | == and equals method different | #java
Array:
An array in Java is a data structure that stores elements of the same type in contiguous memory locations.
It provides a way to store and access a fixed-size sequential collection of elements.
Multidimensional Array:
A multidimensional array in Java is an array of arrays.
It can be visualized as a table with rows and columns, where each cell contains an element.
Example: int[][] matrix = {{1, 2, 3}, {4, 5, 6}};
String in Java:
In Java, a String is a sequence of characters.
It is an object, and the Java language provides special support for strings.
Example: String greeting = "Hello, Java!";
== and equals method difference:
== is used for reference comparison, i.e., it checks if two references point to the same memory location.
equals() is a method in the Object class that is overridden by many classes, including String, to compare the content of objects.
Example:
java
Copy code
String str1 = new String("Hello");
String str2 = new String("Hello");
System.out.println(str1 == str2); // false (reference comparison)
System.out.println(str1.equals(str2)); // true (content comparison)
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