Raja has Published 259 Answers

Raja has Published 259 Answers

How to detect the value change of a JSlider in Java?

Java Object Oriented Programming Programming

raja

Published on 16-Aug-2019 18:21:18

A JSlider is a subclass of JComponent class and it is similar to scroll bar which allows the user to select a numeric value from a specified range of integer values. A JSlider has a knob which can slide on a range of values and can be used to select ... Read More

How to read the data from a CSV file in Java?

Java Object Oriented Programming Programming

raja

Published on 16-Aug-2019 18:12:38

A CSV stands for Comma Separated Values. In a CSV file, each line contains words that are separated with a comma(, ) and it is stored with a .csv extension.We can read a CSV file line by line using readLine() method of BufferedReader class. Split each line on comma character to get the words ... Read More

How can we print all the capital letters of a given string in Java?

Java Object Oriented Programming Programming

raja

Published on 16-Aug-2019 17:54:48

The Character class is a subclass of Object class and it wraps a value of the primitive type char in an object. An object of type Character class contains a single field whose type is char.We can print all the uppercase letters by iterating the characters of a string in a loop and check ... Read More

How can we implement a custom iterable in Java?

Java Object Oriented Programming Programming

raja

Published on 16-Aug-2019 17:04:26

An Iterable interface is defined in java.lang package and introduced with Java 5 version. An object that implements this interface allows it to be the target of the "for-each" statement. This for-each loop is used for iterating over arrays and collections. An Iterable interface can also be implemented to create custom behavior.Syntaxpublic interface ... Read More

Importance of return type in Java?

Java Object Oriented Programming Programming

raja

Published on 16-Aug-2019 16:34:01

A return statement causes the program control to transfer back to the caller of a method. Every method in Java is declared with a return type and it is mandatory for all java methods. A return type may be a primitive type like int, float, double, a reference type or void type(returns ... Read More

How to create a thread without implementing the Runnable interface in Java?

Java Object Oriented Programming Programming

raja

Published on 09-Aug-2019 19:56:17

A Thread can be called a lightweight process. Java supports multithreading, so it allows our application to perform two or more task concurrently. All Java programs have at least one thread, known as the main thread, which is created by the Java Virtual Machine (JVM) at the program start when the ... Read More

How to read the data from a .properties file in Java?

Java Object Oriented Programming Programming

raja

Published on 09-Aug-2019 19:23:28

The Properties is a subclass of HashTable class and it represents a persistent set of properties. The Properties can be saved to a stream or loaded from a stream. Each key and its corresponding value in the property list is a string. The Properties file can be used in Java to externalize the ... Read More

How to instantiate a static inner class with reflection in Java?

Java Object Oriented Programming Programming

raja

Published on 09-Aug-2019 17:39:54

A static inner class can be instantiated without the need for an instance of the outer class. In general, an Inner class is a part of nested class, called Non-static nested classes in Java. The types of inner classes are member inner class, anonymous inner class, and local inner class.We can instantiate ... Read More

Will a finally block execute after a return statement in a method in Java?

Java Object Oriented Programming Programming

raja

Published on 09-Aug-2019 16:38:22

Yes, the finally block will be executed even after a return statement in a method. The finally block will always execute even an exception occurred or not in Java. If we call the System.exit() method explicitly in the finally block then only it will not be executed. There are few situations where ... Read More

Importance of XOR operator in Java?

Java Object Oriented Programming Programming

raja

Published on 09-Aug-2019 13:45:08

Bitwise XOR (exclusive or) "^" is an operator in Java that provides the answer '1' if both of the bits in its operands are different, if both of the bits are same then the XOR operator gives the result '0'. XOR is a binary operator that is evaluated from left to ... Read More

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