Java Array to String
After knowing how to convert string to array, let us find the other way of converting array to string. Following links of this same web site, way2java.com, get you the job. 1. Char & Byte array to...
View ArticleJava Extends
An OOPs language is meant more for reusability. It achieves reusability with "has-a" relation (through composition) and "is-a" relation (through inheritance). For "has-a" relationship, known as...
View ArticleJava Extend Multiple Classes
In the earlier, Bird-Ostrich inheritance program, Ostrich extends only one class, Bird, because Ostrich wants to walk and the method is there in Bird’s class. Now Ostrich also wants to eat but the...
View ArticleJava Implements
We have seen earlier the meaning of extends and importance of inheritance (with example of multilevel inheritance) in Java Extends and Java Extend Multiple classes (knowing these is very essential to...
View ArticleJava Extends and Implements
Once you know the basic structure of a Java class, know inheritance with concrete classes and abstract classes, know to inherit interfaces, it is the time for both extends and implements where you...
View ArticleExtends vs Implements
Java uses two keywords to inherit – extends and implements. The difference of them and their usage is trivial to understand. Go through the following combinations and rules one-by-one. Write small...
View ArticleJava Date to String
It is required in Java, many a times in programming, to convert Date to String and also String to Date. To do either, the best class we can use is java.text.SimpleDateFormat. Following explanation...
View ArticleJava String to Date
After converting Date to String, let us see the other way of converting String to Date. The same java.text.SimpleDateFormat class used in Date to String is used here. Following code explains. 1 2 3 4 5...
View ArticleJava Parse String to Date
Sometimes, it is also needed to convert String to Date; we have seen earlier how to convert Date to String. Following code gets you the conversion of string to date. We use SimpleDateFormat class...
View ArticleJava Conversions
Following topics give the conversions between different concepts of Java like, date to string, array to string, string to arraylist, numbers to words etc. OOPS 1. Abstract class vs Interface 2. Java...
View ArticleJDBC Performance Tuning
1.0 Introduction 1.1 Connection Pooling 2.0 Auto-Commit 3.0 Closing JDBC objects 4.0 Optimization with Statement 4.1 Choose right Statement interface 4.2 Do batch update 4.3 Do batch retrieval using...
View ArticleServlets and JSP Performance Tuning
The following pages describe performance-tuning techniques (PTT) for developing high performance and scalable JSP (JavaServer Pages) pages and servlets. This means building applications that are...
View ArticleCore Java Performance Tuning – 1
1. Introduction 2. When to think of Performance 3. JVM’s and JIT Compilers 4. Default constructors 5. Constructor Hierarchies 6. Instance variables Vs Class(static) variables 7. Recycling Objects 8....
View ArticleJava Performance Tuning – 2
1.0 Introduction 2.0 Algorithm Analysis 3.0 Data Structures 3.1 Sets and SortedSets 3.2 Lists 3.3 Maps and Sorted Maps 4.0 Summary 5.0 JVM Tuning 5.1 Server Mode 5.2 Sizing the Heap 5.3 GC Monitoring...
View ArticleArrayList vs LinkedList
There comes two classes ArrayList and LinkedList to store objects. Internally, ArrayList stores elements as an array form and LinkedList stores elements in node form. Due to their internal style of...
View ArticleString Java
Java string manipulation is easy due to String and StringBuffer classes’ predefined methods. Following link gives you all the possible operations you can do on string in Java. 1. One stop destination...
View ArticleJDK 1.7 Features
JDK 1.7 (Java SE 7), code names as Dolphin was released on July 28, 2011. Following is the list of new features added, of daily importance. 1. String in Switch Expression 2. Underscores Between Digits...
View ArticleAccess Specifier vs Access Modifier in Java
For a novice, both the words specifier and modifier looks one and the same and may be confusing. If you go by the literal meaning, it is more confusing, say, an access specifier specifies the access...
View ArticleOverloading and Overriding Java
Overloading and overriding are two concepts Java supports in supporting OOP methodology. Both are very different in their meaning and implementation (or usage). A) Links for Method Overloading: 1....
View ArticleAnnotations Introduction
Annotations were introduced with JDK 1.5 with the addition of APT (Annotation Processing Tool) tool where you are required to give a separate path for processor tool. Later in JDK 1.6, the tool was...
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