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Java Util package Quiz

on September 13, 2016

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Awt Package

The Java programming language class library provides a user interface toolkit called the Abstract Windowing Toolkit, or the AWT. The AWT is both powerful and flexible. Newcomers, however, often find that its power is veiled. The class and method descriptions found in the distributed documentation provide little guidance for the new programmer. Furthermore, the available examples often leave many important questions unanswered. Of course, newcomers should expect some difficulty. Effective graphical user interfaces are inherently challenging to design and implement, and the sometimes complicated interactions between classes in the AWT only make this task more complex. However, with proper guidance, the creation of a graphical user interface using the AWT is not only possible, but relatively straightforward. This article covers some of the philosophy behind the AWT and addresses the practical concern of how to create a simple user interface for an applet or application. What is a user int...

HashMap in java util package

import java.util.*; class HashMapDemo { public static void main(String args[]) { // Create a hash map. HashMap hm = new HashMap(); // Put elements to the map hm.put("Devesh",new Double(1000.00)); hm.put("Rahul",1500.00); hm.put("Rakesh",1200.00); hm.put("Manohar",900.00); hm.put("Prateek",1300.00); // Get a set of the entries. Set set = hm.entrySet(); // Display the set. Iterator i = set.iterator(); while(i.hasNext()) { Map.Entry me = (Map.Entry) i.next(); System.out.print(me.getKey() + ": "); System.out.println(me.getValue()); } System.out.println(); // Deposit 1000 into Prateek's account. double balance = (Doub...

How to install ant tool in window OS

Before you install the Force.com Migration Tool you will need Java and Ant installed on your local machine. Then you can download the Force.com Migration Tool from a Salesforce organization. 1. Install Java and Ant, as described in Prerequisites for Using the Force.com Migration Tool. Step 1 - Install java. For install java go to java download and download latest version of java.and install it. To verify the installation of java open cmd(command prompt) and run java -version command it will return the version of java if java successful install. Step 2 - Install ant. Please download ant file here apache-ant-1.9.7 Unzip file and paste in C drive Ant Tool Unzip file and paste where you want to use ant Set Path using Command C:\>set ANT_HOME=C:\apache-ant-1.9.7 C:\>set JAVA_HOME=java path(Example - C:\Program Files\Java\jdk1.7.0_79) C:\>set PATH=%ANT_HOME%\bin;%JAVA_HOME%\bin C:\>ant -version Apache Ant(TM) version 1.9.7 compiled on April...

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Java Util package Quiz

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