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Java Program to show Overloading Constructors – Q21

January 11, 2009 Leave a comment

Q21: Java Program to show overloading constructors

Constructors are used to create instances of an object and can be overloaded by creating more than one Constructor in a class with same name but having different signatures.

class Emp_class{
	private String name;
	private int salary;
	
	public Emp_class(){
		name = "Manoj Pandey";
		salary = 10500;
	}
	
	public Emp_class(String n, int s){
		name = n;
		salary = s;
	}
	
	public Emp_class(Emp_class Oemp){
		name = Oemp.name;
		salary = Oemp.salary;
	}
	
	public void show(){
		System.out.println("\n Name: " + name);
		System.out.println(" Salary: " + salary);
	}
}

class ctor_ovld{
	public static void main(String args[]){
		Emp_class Oe1 = new Emp_class();
		Oe1.show();
		
		Emp_class Oe2 = new Emp_class("Nitin", 25050);
		Oe2.show();
		
		Emp_class Oe3 = new Emp_class("Bhuwanesh", 30050);
		Oe3.show();

		Emp_class Oe4 = Oe2;
		Oe4.show();
	}
}

… from College notes (BCA/MCA assignments):

Categories: Java Tags: ,

Java Program to sort an array of strings – Q20

January 10, 2009 Leave a comment

Q20: Java Program to sort an array of strings

class SortString{
	static String arr[] = { "Now", "is", "the", "time", "for", 
    "all", "good", "men", "to", "come", 
    "to", "the", "aid", "of", "their", 
    "country" };
	
	public static void main(String args[]){
		for(int j=0; j<arr.length; j++){
			for(int i=j; i<arr.length; i++){
				if(arr[i].compareTo(arr[j]) < 0){
					String t = arr[j];
					arr[j] = arr[i];
					arr[i] = t;
				}
			}
			System.out.println(arr[j]);
		}
	}
}

… from College notes (BCA/MCA assignments):

Categories: Java Tags: ,

Java Program to calculate income tax on salary – Q19

January 10, 2009 Leave a comment

Q19: Java Program to calculate income tax on salary:
( sal < 1.5lac = 15%, 1.5 < sal 2.5lac = 30% )

import javax.swing.*;

class inc_tax{
	public static void main(String args[]){
		String inp;
		inp = JOptionPane.showInputDialog("Enter Salary: ");
		
		int sal;
		sal = Integer.parseInt(inp);
		
		double tax;
		if(sal < 150000)
			tax = sal * 15/100;
		else if(sal >= 150000 && sal < 250000)
			tax = sal * 20/100;
		else
			tax = sal * 30/100;
		
		System.out.println("Tax on Annual salary " + sal + " is: " + tax);
	}
}

… from College notes (BCA/MCA assignments):

Categories: Java Tags: ,

Java Program to find weather a given string is palindrome or not – Q18

January 9, 2009 Leave a comment

Q18: Java Program to find weather a given string is palindrome or not

import javax.swing.*;

class palindrome{
	public static void main(String args[]){
		String wd;
		int i, len;
		boolean ispal;

		wd = JOptionPane.showInputDialog("Enter a Word:");
		len = wd.length();
		
		i=0;
		ispal=true;
		for(;i<=len;){
			if(wd.charAt(i) == wd.charAt(len-1)){
				i++;
				len--;
				}
			else{
				ispal = false;
				break;
			}
		}
		if(ispal==true)
			System.out.println("The String " + wd + " is Palindrome.");
		else
			System.out.println("The String " + wd + " is not Palindrome.");
	}
}

… from College notes (BCA/MCA assignments):

Categories: Java Tags: ,

Java Program to convert binary to decimal – Q17

January 9, 2009 Leave a comment

Q17: Java Program to convert binary to decimal

import javax.swing.*;

class bin_dec{
	public static void main(String args[]){
		int bin, dec, i, x;
		String inp;
		//bin = Integer.parseInt(args[0]);
		inp = JOptionPane.showInputDialog("Enter a Binary 
    Number:");
		bin = Integer.parseInt(inp);
		i=0;
		dec = 0;
		while(bin != 0){
			x = bin % 10;
			dec += x * Math.pow(2,i);
			bin /= 10;
			i++;
		}
		System.out.println("Decimal: " + dec);
	}
}

… from College notes (BCA/MCA assignments):

Categories: Java Tags: ,