Arrays
Java arrays store multiple values of the same type in a fixed-size, indexed structure — but unlike C, Java arrays are objects, and Java performs automatic bounds checking at runtime.
💡 Key insight
Accessing an out-of-range index in Java throws an ArrayIndexOutOfBoundsException instead of silently corrupting memory like in C.
Syntax
syntax
type[] arrayName = new type[size];
type[] arrayName = {value1, value2, ...};Example
scores.length gives the array's size directly — no need for the C-style sizeof trick.
java
public class Main {
public static void main(String[] args) {
int[] scores = {90, 85, 70, 60, 95};
for (int i = 0; i < scores.length; i++) {
System.out.print(scores[i] + " ");
}
}
}output90 85 70 60 95
Try it yourself
Copy this example into the Java compiler and run it — try changing a value and see what happens.