Arrays refer to a sequential collection of elements of the same type. It is used to store a collection of data. Unlike Javascript where an array can hold many elements of different data types, an array in Java holds a fixed number of values of a single type.
Immediately after creating an array, its length is fixed. Each item in an array is referred to as an element, and each element can be accessed by its numerical index.
An array index begins from 0 and begins to increment for the given length of the array.
Syntax
dataType [] arrayRefValue; //Preferred way
dataTaype arrayRefValue []; //Not so preferred way
Processing Arrays
public class TestArray {
public static void main(String [] args) {
double [] myList = {1.2, 1.4, 2.5, 4.5, 1.6}
System.out.println(myList[0]) // 1.2
System.out.println(myList[1]) // 1.4
System.out.println(myList[2]) // 2.5
System.out.println(myList[3]) // 4.5
System.out.println(myList[4]) // 1.6
}
}
Summing All Elements in an Array
public class TestArray {
public static void main(String [] args) {
double [] myList = {1.2, 1.4, 2.5, 4.5, 1.6}
double total = 0;
for(int i=0; i<myList.length; i++){
total +=myList[i];
}
System.out.println("Total is "+total); //11.2
}
}
Finding The Largest Element in an Array
public class TestArray {
public static void main(String [] args) {
double [] myList = {1.2, 1.4, 2.5, 4.5, 1.6}
double max = myList[0];
for(int i=0; i<myList.length; i++){
if(myList[i] > max) max = myList[i];
}
System.out.println("Largest value is "+max); //4.5
}
}
See the official Java documentation for Arrays
THE END.
QR codes have evolved from a niche tracking technology to an indispensable digital connector, seamlessly…
Artificial Intelligence (AI) has made remarkable progress in recent years, transforming industries such as healthcare,…
Climate change is one of the most pressing challenges of our time, with rising global…
In the last few decades, technology has become so embedded in our daily lives that…
In recent years, drones have become more than just cool gadgets or tools for tech…
Looking to build mobile apps in Abuja? Choosing the right framework is crucial for performance,…