Java: Arrays()-java

Java: Arrays()

An array of strings

String[] cars = {"Volvo", "BMW", "Ford", "Mazda"};

An array of integers

int[] myNum = {10, 20, 30, 40};

Change an Array Element

String[] cars = {"Volvo", "BMW", "Ford", "Mazda"};
cars[0] = "Opel";
System.out.println(cars[0]);
// Now outputs Opel instead of Volvo

Array Length

String[] cars = {"Volvo", "BMW", "Ford", "Mazda"};
System.out.println(cars.length);
// Outputs 4

Multidimensional Arrays

int[][] myNumbers = { {1, 2, 3, 4}, {5, 6, 7} };

Access Elements

int[][] myNumbers = { {1, 2, 3, 4}, {5, 6, 7} };
System.out.println(myNumbers[1][2]); // Outputs 7

Change Element Values

int[][] myNumbers = { {1, 2, 3, 4}, {5, 6, 7} };
myNumbers[1][2] = 9;
System.out.println(myNumbers[1][2]); // Outputs 9 instead of 7

An array of strings

String[] cars = {"Volvo", "BMW", "Ford", "Mazda"};

An array of integers

int[] myNum = {10, 20, 30, 40};

Change an Array Element

String[] cars = {"Volvo", "BMW", "Ford", "Mazda"};
cars[0] = "Opel";
System.out.println(cars[0]);
// Now outputs Opel instead of Volvo

Array Length

String[] cars = {"Volvo", "BMW", "Ford", "Mazda"};
System.out.println(cars.length);
// Outputs 4

Multidimensional Arrays

int[][] myNumbers = { {1, 2, 3, 4}, {5, 6, 7} };

Access Elements

int[][] myNumbers = { {1, 2, 3, 4}, {5, 6, 7} };
System.out.println(myNumbers[1][2]); // Outputs 7

Change Element Values

int[][] myNumbers = { {1, 2, 3, 4}, {5, 6, 7} };
myNumbers[1][2] = 9;
System.out.println(myNumbers[1][2]); // Outputs 9 instead of 7