Pad a String with Spaces in Java

Pad a String with Spaces inJava Since Java 1.5 we can use the method java.lang.String.format(String , object) and use printf like format. The format string "%1$15s" will do the job. Where 1$ indicates the argument index, s indicates that the argument is a String 15 represent the minimal...

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Java 8 Default and static methods in Interfaces

Java 8 Default and static methods in Interfaces Java 8 is come up with really good features likes Funtional interface, Lambda expression, Stream, static and default method in interface etc. Before java 8 an interface in java can contain only abstract method so now java 8 allow having default and static methods. Default methods...

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Inner classes in java

Inner classes in java In java inner class which is defined inside another class is called nested class or non-static inner class. For instantiating the inner class or nested class object we first need to create the outer class object. We can access outer class member’s variables insides of inner class just like normal members...

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Static inner class in java

Static inner class in java In java a static class which is defined inside another outer class is called static nested class or static inner class. A static inner class is nested class which can be accessed without creating the object of the outer class. We can access like static other static members of class. A static inner...

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Functional Interfaces

Functional Interfaces A functional Interface concept introduced in java 8 with some amazing features. So let’s check it out properties and example. Functional interface in java is an interface which contains only a single abstract method and can contain any number of default and static methods which do have an implementation....

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Java 8 features with examples

Java 8 features with examples java 8 features techfloaters Java 8 is long term support (LTS) release in 18 March 2014, in this article I will summarizes the features and enhancements in Java SE 8. There are many packages and symbols...

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Hashtable in java

Hashtable in java Java Hashtable class is available since jdk1.0 which is oldest class in java present in java.util package. Java Hashtable internally contains buckets where the key/value pairs are stored in buckets. A Hashtable class is an array of a list structure. Each list is known as a bucket. The position of the bucket...

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Best Way to Iterate Any Map in java

Best Way to Iterate Any Map in java Best way to iterate map in java- techfloaters Iterating over Map in java there are basically 4 different ways in this article we will look each and every one by one with example. Also we will use Java 8 forEach()...

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Treemap vs Hashmap

Treemap vs Hashmap In this topics we are discussing the very interesting topics about difference between HashMap and TreeMap. Basically both directly or indirectly implements Map interface so some of the functionality is common in both. Still there is some major differences based upon that we can use any one of them in...

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TreeMap in java

TreeMap in java The TreeMap is sorted according to the natural ordering of its keys, or by a Comparator provided at map creation time, depending on which constructor is used. Java TreeMap is a part of collection since jdk 1.2 versions and available in java.util package. TreeMap implements the Map interface...

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