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 […]
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[]) { […]
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 […]
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 { […]
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 […]
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 […]
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 = […]
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 […]
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 […]
In this article we will learn to implement a Java program that illustrates how runtime polymorphism is achieved. A Java program is provided below that demonstrates how runtime polymorphism is achieved. abstract class Figure { int dim1, dim2; Figure(int x, int y) { dim1 = x; dim2 = y; } abstract void area(); } class […]