This program is to demonstrate the working of the Caesar Cipher, which is the simplest encryption technique. This program will convert plain text to cipher text and vice-versa. Caesar Cipher at Wikipedia: The program runs through two loops. One to …
In this post, i will demonstrate how to connect your java program with a Database(MySQL, JavaDB, etc). You need to follow the following steps in order to accomplish a connection between your java program and a database. Step 1: Create …
In this program, we will see how a JList can be updated at run-time. We’ll be making use of the JList class and a few methods which will help us update a list at run-time. So basically, first we initialize …
This program will demonstrate how we can list files present in a directory. Java provides us with the File class which will help us do this. To start off, files we need to import:
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import java.io.File; |
Our first task is to …
In this post, we will be learning how to open a URL in java. This post basically will explain how to use the built-in URL class. URL class is found in:
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import java.net.URL; |
Next thing that we require is a BufferedReader …
This program is a Tic Tac Toe game. Info: http://en.wikipedia.org/wiki/Tic-tac-toe In this program, i have used JButtons and JLabel. What this program does: 1. Checks for all possible winning conditions. 2. Different colors to mark X and O respectively. 3. …
In this program, we will see how we can add a bunch of similar components like JButton, JTextField, JCheckBox, etc to the main window in java. We will be making use of the component array, JButton[] in this case to …
This is a simple calculator which can add, subtract, multiply and divide two numbers. There’s not much logic involved in the program, just made it to demonstrate different GUI elements.
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import java.awt.*; import java.awt.event.ActionEvent; import java.awt.event.ActionListener; import javax.swing.*; public class Calculator { JButton add,divide,multiply,sub; JTextField num1,num2; JLabel ans; public Calculator(){ JFrame frame = new JFrame("Calculator - MyCoding.net"); num1 = new JTextField (10); ans = new JLabel(""); num2 = new JTextField (9); add = new JButton ("+"); divide = new JButton("/"); multiply = new JButton("X"); sub = new JButton ("-"); frame.setVisible(true); frame.setBounds(500, 200, 290, 210); frame.setLayout(new GridLayout(0,2,1,1)); frame.add(new JLabel("First Number: ")); frame.add(num1); frame.add(new JLabel("Second Number: ")); frame.add(num2); frame.add(new JLabel("Answer: ")); frame.add(ans); frame.add(add); frame.add(sub); frame.add(multiply); frame.add(divide); add.addActionListener(new HandlerClass()); sub.addActionListener(new HandlerClass()); divide.addActionListener(new HandlerClass()); multiply.addActionListener(new HandlerClass()); } public static void main(String[] args) { new Calculator(); } public class HandlerClass implements ActionListener{ public void actionPerformed(ActionEvent ae){ try{ int fnum = Integer.parseInt(num1.getText()); int snum = Integer.parseInt(num2.getText()); if(ae.getSource()== add){ ans.setText(String.valueOf(fnum+snum)); } else if(ae.getSource()== sub){ ans.setText(String.valueOf(fnum-snum)); } else if(ae.getSource()== multiply){ ans.setText(String.valueOf(fnum*snum)); } else{ ans.setText(String.valueOf(fnum/snum)); } }catch(Exception e) { JOptionPane.showMessageDialog(null, "Please enter a valid number"); e.printStackTrace(); } } } } |
Output: Executable JAR file: http://www.mediafire.com/?6bbweg0ivd8id6n
In this post, we will learn how to create tables in Java. We will be using the JTable class which can be found in javax.swing package. Firstly, we need to create a JFrame in which the table will be displayed. …
This question was asked at a forum, link. The question is quite self explanatory. We have to write a program that takes in a number between 1 to 366 and displays the corresponding date.
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#include <iostream> using namespace std; void display_month(int); int main() { int num,num1=60,num2=91,monthnum=2,count=1,day; bool flag=true; cout<<"Please enter a number between 1 to 366: "<<endl; cin>>num; if(num<=0 && num>366) { cout<<"Please enter a valid number."<<endl; } else if(num>0 && num<=31) { monthnum = 1; day=num; } else if(num>31 && num<=60) { monthnum=2; day=num-31; } else { do{ if(num>num1 && num<=num2) { monthnum++; day=num-num1; flag=false; break; } else { if(count%2==0) { num1+=30; num2+=30; count++; monthnum++; //cout<<"Adding 30 to both nums: "<<num1<<" "<<num2<<endl; } else { num2+=31; num1+=31; count++; monthnum++; //cout<<"Adding 31 to both nums: "<<num1<<" "<<num2<<endl; } } }while(flag); } display_month(monthnum); cout<<" "<<day<<" 2004"; cin.get(); cin.get(); } void display_month(int month) { switch(month){ case 1: cout<<"January"; break; case 2: cout<<"February"; break; case 3: cout<<"March"; break; case 4: cout<<"April"; break; case 5: cout<<"May"; break; case 6: cout<<"June"; break; case 7: cout<<"July"; break; case 8: cout<<"August"; break; case 9: cout<<"September"; break; case 10: cout<<"October"; break; case 11: cout<<"November"; break; case 12: cout<<"December"; break; default: cout<<"Could not find month."; break; } } |
Tested in Visual C++ 2010