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 […]
In this article we will learn to implement a Java program for sorting a given list of names in ascending order. A Java program is provided for sorting a given list of names or strings in ascending order. Program is as follows: import java.util.*; class Sorting { void sortStrings() { Scanner s = new […]
In this article we will learn to implement a Java program that checks whether a given string is a palindrome or not. A Java program is provided below that reads a string, checks whether it is a palindrome or not. Program is as follows: import java.util.*; class Palindrome { void isPalindrome(String str) { String […]