Category: Java

This post will discuss how to convert the object array to a string array in Java.

This post will discuss how to convert HashMap to TreeMap in Java. The resultant TreeMap should contain all mappings of the HashMap, sorted by their natural ordering of keys.

This post will discuss how to find the index of an element in a primitive or object array in Java.

This post will discuss how to rename a file in Java.

This post will discuss how to merge two sets in Java using plain Java, Java 8, Guava, and Apache Commons Collections.

This post will discuss how to convert a string to a Boolean in Java. In other words, return the Boolean value represented by a specified string.

This post covers various methods to validate a password in Java.

This article will discuss different ways to create a mutable, unmodifiable, immutable, and fixed-length empty list in Java.

This post will discuss how to convert map to an array in Java.

This post will discuss how to reverse a sequential stream in Java. Since streams don’t store any elements, an intermediate collection is used to create a new stream which iterates elements of the specified stream in reverse order.

This post will discuss how to get a sublist of a list between two specified indexes in Java.

This post will discuss how to implement the trim() method in Java.