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Showing posts with label Java Learning. Show all posts
Showing posts with label Java Learning. Show all posts

package javax.annotation does not exist

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Error package javax.annotation does not exist ; this means that configured JDK is not working properly or there is some conflict in installe...

New Features in JAVA10

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JAVA 10 NEW FEATURES 1. Local Variable Type Inference 2. Time-Based Release Versioning 3. Garbage-Collector Interface 4. Parallel Full G...

Environment variable What, Why, Where and How?

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What is environment variable? Environment variable is variable which holds the path of the software installed in your machine. Why d...
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How to swap two variable without using temporary variable in java?

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Swap two integer variable a and b without using any temporary variable. Set the initial value for two variable and then swap the value f...

How to swap two Integer variables without using the third variable?

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Swap two integer variable a and b without using any temporary variable. Set the initial value for two variable and then swap the value f...

How to swap two String variables without using the third variable?

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We are going to see how to swap two variable of type String without using any third or temporary variable.  This is very frequent questi...

Find minimum and maximum number from a given array

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This is an example code snippet to find the minimum and maximum number in a given Array using Java programming.  1 2 3 4 5 6 7 ...

Convert date-time from 12 to 24 hours of format

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Today we are going to see, how we can convert a 12 hour time format into 24 hour(military) time format. For example we have date like 12 A...
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Recursive method in Java

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How to write a recursive method in Java? Below is the code snippet of a recursive method in Java to generate numbers and check the num...

How to run a Java Application or program without main method?

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Below is the code snippet to execute and run a java program without main method. 1 2 3 4 5 6 7 8 9 10 11 package rashid. j...

trimToSize() in Java

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trimToSize() method used to reduce the capacity of the ArrayList, StringBuffer and StringBuilder in Java. Trims the capacity of the insta...

How to iterate on a JSON objects using Java

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Today we are going to see how to iterate on a JSON object or read a JSON file and fetch key and value from that JSON file using Java. Bel...

How to store multiple values for a key into Map using JAVA

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Today we will practice a program to assign or set multiple values or list of values or ArrayList for a key in Map. And also how to iterate...

Error: Could not find or load main class

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If you are getting the error  Error: Could not find or load main class when you try to run any java program in using eclipse then you coul...

Eclipse shortcuts for Java programming

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When you are working with Eclipse IDE to write the java programs, we have too many shortcuts to write the statements in java which Eclipse...

Pass by reference and pass by value in Java

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Today in this tutorial of Java program we will see how to work with pass by value and pass by reference.  Below is code snippet. 1 ...

Working with list and arrayList in Java.

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In this tutorial we will see a simple and small implementation of List and ArrayList using Java. ArrayList is resize-able implementati...

Import and Export Java project in a Zip file in Eclipse

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Importing a Java Project from a Zip File into a Workspace In the past, we have imported projects as JAR files into the src folder of an ...

No compiler is provided in this environment. Perhaps you are running on a JRE rather than a JDK?

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If you are getting error "No compiler is provided in this environment. Perhaps you are running on a JRE rather than a JDK?" whil...