This post shows readers how to create an array in Java. Including: Array Lists, multidimensional arrays, maps, and more.

One way you can create an object directly using new operator of the class which is at your classpath. You can create an instance of a class using java.lang.reflect package of JDK.

Copying objects is a common Java programming operation that has one serious trap. Here's how to avoid copying from an object reference and only copy the instance and values you want.

This tutorial explains how a Java HashMap works internally and explores the challenges of implementing it, including buckets, collisions and hash codes.

Java length vs length () explained The key difference between Java’s length variable and Java’s length () method is that the Java length variable describes the size of an array, while Java’s length () ...