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Aatul Palandurkar

Posts Tagged ‘Java Tutorials

Pattern 2 :

1
2 2
3 3 3
4 4 4 4
5 5 5 5 5

Java Program for the above pattern:


import java.util.Scanner;



public class MainClass

{

public static void main(String[] args)

{

Scanner sc = new Scanner(System.in);



//Taking rows value from the user
System.out.println("How many rows you want in this pattern?");



int rows = sc.nextInt();



System.out.println("Here is your pattern....!!!");



for (int i = 1; i <= rows; i++)

{

for (int j = 1; j <= i; j++)

{

System.out.print(i+" ");

}



System.out.println();

}



//Close the resources
sc.close();

}

}

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Objectives :

  • How to convert Decimal to Hexadecimal in Java?

 

Java Program to convert Decimal values to Hexadecimal values : 


import java.util.Scanner;

public class DecimalToHexadecimal {

public static void main(String[] args) {

Scanner input = new Scanner(System.in);

System.out.print("Enter decimal number you like: ");
int deci = input.nextInt();

System.out.println("The hexadecimal number for decimal "
+ deci + " is " + convert(deci));
}

public static String convert(int decimal) {
String hex = "";

while (decimal != 0) {
int hexValue = decimal % 16;
hex = toHexadecimal(hexValue) + hex;
decimal = decimal / 16;
}

return hex;
}

public static char toHexadecimal(int hexValue) {
if (hexValue <= 9 && hexValue >= 0) {
return (char) (hexValue + '0');
} else {
return (char) (hexValue - 10 + 'A');
}
}
}

Output :
Enter decimal number you like: 1234
The hexadecimal number for decimal 1234 is 4D2

Objectives :

  • Convert Decimal number to Roman number
  • Convert Decimal numeral to Roman numeral
  • How to convert a decimal number to roman number
  • Write a program that converts a decimal number to Roman number.
  • Write a program that converts a decimal number to Roman number. Decimal Number is accepted using Scanner class at the time of execution.
  • Write a program that converts a decimal number to Roman number. Decimal Number is accepted as command line input at the time of execution.

 

Program : 

Java program that converts a decimal number to Roman number. Decimal Number is accepted using Scanner class at the time of execution.


&nbsp;

import java.util.Scanner;

public class DecimalToRoman {

private static String toRoman(int num) {
String[] romanCharacters = { "M", "CM", "D", "C", "XC", "L", "X", "IX", "V", "I" };
int[] romanValues = { 1000, 900, 500, 100, 90, 50, 10, 9, 5, 1 };
String result = "";

for (int i = 0; i < romanValues.length; i++) {
int numberInPlace = num / romanValues[i];
if (numberInPlace == 0) continue;
result += numberInPlace == 4 && i > 0? romanCharacters[i] + romanCharacters[i - 1]:
new String(new char[numberInPlace]).replace("\0",romanCharacters[i]);
num = num % romanValues[i];
}
return result;
}

public static void main(String[] args) {
Scanner scanner = new Scanner(System.in);
System.out.print("Enter a number : ");
int decimal = scanner.nextInt();
System.out.println(toRoman(decimal));
}

}

Output :

Enter a number : 1234

MCCXXXIV

Java program that converts a decimal number to Roman number. Decimal Number is accepted as command line input at the time of execution.


public class DecimalToRoman {

private static String toRoman(int num) {
String[] romanCharacters = { "M", "CM", "D", "C", "XC", "L", "X", "IX", "V", "I" };
int[] romanValues = { 1000, 900, 500, 100, 90, 50, 10, 9, 5, 1 };
String result = "";

for (int i = 0; i < romanValues.length; i++) {
int numberInPlace = num / romanValues[i];
if (numberInPlace == 0) continue;
result += numberInPlace == 4 && i > 0? romanCharacters[i] + romanCharacters[i - 1]:
new String(new char[numberInPlace]).replace("\0",romanCharacters[i]);
num = num % romanValues[i];
}
return result;
}

public static void main(String[] args) {
if(args.length<1 || args.length>1){
System.out.println("Wrong input");
}else{
String number = args[0];
int decimal = Integer.parseInt(number);
System.out.println(toRoman(decimal));
}
}

}

Objectives :

  • Decimal to Binary Conversion
  • Converting Decimal to Binary
  • Converting Decimal Number to Binary format
  • Write a program to convert decimal to binary
  • Write a program to convert decimal number to binary format
  • Write a program to convert positive decimal number to binary format
  • Write a program to convert decimal to binary using Scanner class
  • Write a program to convert decimal to binary, take input using Scanner class

 

Java Program to convert Decimal to Binary : 

public class DecimalToBinary {
 
 public void toBinary(int number){
 int binary[] = new int[25];
 int n = 0;
 // Convert Decimal to Binary
 while(number > 0){
 binary[n++] = number%2;
 number = number/2;
 }
 // Print Binary number
 for(int i = n-1;i >= 0;i--){
 System.out.print(binary[i]);
 }
 }
 
 public static void main(String[] args){
 DecimalToBinary obj = new DecimalToBinary();
 obj.toBinary(14);
 }
}

Output :

1110

 

Java Program to convert Decimal to Binary using Scanner class :


import java.util.Scanner;

public class DecimalToBinary {

public void toBinary(int number){
int binary[] = new int[14];
int n = 0;

// Convert Decimal to Binary
while(number > 0){
binary[n++] = number%2;
number = number/2;
}

// Print Binary Number
for(int i = n-1;i >= 0;i--){
System.out.print(binary[i]);
}
}

public static void main(String[] args) {
Scanner scanner = new Scanner(System.in);
System.out.print("Enter a number: ");
int num= scanner.nextInt();
DecimalToBinary obj = new DecimalToBinary();
obj.toBinary(num);

}
}

Output :

Enter a number: 14

1110

Conducted a Workshop on Core Java at Tulsiramji Gaikwad Patil College of Engineering & Technology, Nagpur on 25 Mar. 2013 & 26 Mar. 2013. It was nice to provide Classroom Training & Workshop on Core Java to students of TGPCET.

Have a look at glimpse of workshop here :

Watch this as You Tube video:


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