Java Archives - Page 4 of 5 - Startertutorials Blog

Applet program to draw lines, ovals, and rectangles

Suryateja Pericherla 01/20/2025 8:11pm GMT+0530 Categories: Applets. 2 Comments

In this article we will implement an Applet program to draw a line, oval and rectangle. An Applet program is provided below to draw lines, ovals, and rectangles. import java.applet.*; import java.awt.*; public class GApplet extends Applet { public void paint(Graphics g) { g.drawLine(20, 20, 500, 20); g.drawRect(20, 40, 200, 40); g.fillRect(300, 40, 200, […]

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Applet program to display file content

Suryateja Pericherla 01/21/2025 8:40pm GMT+0530 Categories: Applets. No Comments

In this article we will learn to implement a Java Applet program to display file content. An Applet program is provided below that displays the content of the file whose name and extension is sample.txt. Program is as follows: import java.applet.*; import java.awt.*; import java.io.*; public class MyApplet extends Applet { public void paint(Graphics […]

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Java program to display the number of characters lines and words in a text file

Suryateja Pericherla 01/20/2025 8:15pm GMT+0530 Categories: Files. 7 Comments

In this article we will learn to implement a Java program to display the number of characters lines and words in a text file. A Java program is provided below that displays the number of characters, lines and words in a text file. import java.io.*; class FileDemo { public static void main(String args[]) { […]

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Java program for displaying file information

Suryateja Pericherla 01/21/2025 8:37pm GMT+0530 Categories: Files. No Comments

In this article we will learn to implement a Java program for displaying file information. A Java program is provided below which takes file name as input and displays its contents. Java program that reads a file name from the user and then displays information about whether the file exists, whether the file is […]

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Java program to display integers and sum using StringTokenizer

Suryateja Pericherla 01/23/2025 6:33pm GMT+0530 Categories: Strings. No Comments

In this article we will learn to implement a Java program to display integers and their sum using StringTokenizer. A Java program is provided below which uses StringTokenizer class, reads a line of integers and then displays each integer and the sum of all integers. Program is as follows: import java.util.*; class StringTokenDemo { […]

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Java program to demonstrate life cycle of a thread

Suryateja Pericherla 01/21/2025 8:49pm GMT+0530 Categories: Threads. No Comments

In this article we will learn to implement a Java program to demonstrate life cycle of a thread. A Java program is provided below to illustrate life cycle of a thread. Program is as follows: import java.util.*; class ChildThread implements Runnable { Thread t; ChildThread() { t = new Thread(this); System.out.println("Thread is in new […]

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Java program that creates three threads

Suryateja Pericherla 01/23/2025 6:25pm GMT+0530 Categories: Threads. No Comments

In this article we will learn to implement a Java program that creates three threads. A java program is provided below to create three threads. First thread displays “Good Morning” every one second, the second thread displays “Hello” every two seconds and the third thread displays “Welcome” every three seconds. Program is as […]

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Java program to generate random numbers

Suryateja Pericherla 01/21/2025 8:39pm GMT+0530 Categories: Basic. No Comments

In this article we will learn to implement a Java program to generate random numbers. A Java program is provided below to generate a set of random numbers between two numbers x1 and x2, and x1>0. Program is as follows: import java.util.*; class RandomGen { public static void main(String args[]) { int min = […]

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Java program on rodent hierarchy

Suryateja Pericherla 01/21/2025 8:36pm GMT+0530 Categories: Inheritance. No Comments

In this article we will learn to implement a Java program on rodent hierarchy. A Java program is provided below which uses the rodent hierarchy to demonstrate inheritance in Java. Java program to create an inheritance hierarchy of Rodent, Mouse, Gerbil, Hamster etc. In the base class provide methods that are common to all Rodents […]

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Java program on shape hierarchy

Suryateja Pericherla 01/23/2025 6:21pm GMT+0530 Categories: Inheritance. No Comments

In this article we will learn to implement a Java program on shape hierarchy. The requirements for writing the program is specified below. Java program to create an abstract class named Shape that contains an empty method named numberOfSides( ).Provide three classes named Trapezoid, Triangle and Hexagon such that each one of the classes […]

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