Tag Archives: java program

Java program to swap first name and last name

Java, , , 
public class SwapFirstNameAndLastName {
    public static void main(String[] args) {
        String name="Sani Kamal";
        System.out.println("Before Swap:\n"+name);
        String firstName=name.substring(0,name.indexOf(" "));
        String lastName=name.substring(name.indexOf(" "));
        String swapName=lastName+" "+firstName;
        System.out.println("After Swap:\n"+swapName);

    }
}

Java program to swap two number without using temporary variable

Java, 
public class SwapNumberWithoutTemp {
    public static void main(String[] args) {
        int num1 = 60;
        int num2 = 70;
        System.out.println("Before Swap");
        System.out.println("num1:" + num1 + " num2:" + num2);
        num1 = num1 + num2;
        num2 = num1 - num2;
        num1 = num1 - num2;
        System.out.println("After Swap");
        System.out.println("num1:" + num1 + " num2:" + num2);
    }
}



		
	
	

	
	


							


	

		
				

			Java program to convert fahrenheit to celsius
		

		
		

			Java, , , 					

	


		

		
import java.io.BufferedReader;
import java.io.InputStreamReader;
import java.text.DecimalFormat;

public class ConvertFahrenheitToCelcius {
    public static void main(String[] args) {
        System.out.println("This program will convert temperature in fahrenheit into celsius.");
        InputStreamReader isr = new InputStreamReader(System.in);
        BufferedReader br = new BufferedReader(isr);
        try {
            System.out.println("Enter temperature in Fahrenheit:");
            String input = br.readLine();
            float tempF = Float.parseFloat(input);
            float tempC = (tempF - 32) * 5 / 9;
            DecimalFormat df = new DecimalFormat("0.00");
            System.out.println("Temperature in Celsius:" + df.format(tempC));

        } catch (Exception e) {
            System.out.println(e.getMessage());
            e.printStackTrace();

        }

    }
}

	

	
	


							


	

		
				

			Java program to convert celsius to fahrenheit
		

		
		

			Java, , , 					

	


		

		
import java.io.BufferedReader;
import java.io.InputStreamReader;
import java.text.DecimalFormat;

public class CelsiusToFahrenheit {
    public static void main(String[] args) {
        System.out.println("This program will convert temperature in celsius into fahrenheit");
        InputStreamReader isr = new InputStreamReader(System.in);
        BufferedReader br = new BufferedReader(isr);
        try {
            System.out.println("Enter Temperature in Celsius:");
            String input = br.readLine();
            float tempC = Float.parseFloat(input);
            float tempF = tempC * 9 / 5 + 32;
            DecimalFormat df = new DecimalFormat("0.00");
            System.out.println("Temperature in Fahrenheit:" + df.format(tempF));

        } catch (Exception e) {
            System.out.println(e.getMessage());
            e.printStackTrace();

        }
    }
}