Help with Java programs. - Overclock.net

[Teh Root] · 10-13-09

Hey guys, I;m currently taking a course in Java and I don't remember how to do this.

1. Write a swtich statement that follows the menu given below.
Enter A to print the name Alan
Enter B to print the name Bob
Enter C to print the name Carl
Enter D to print the name David
If anything else if entered print "Invalid Choice"

How would I do that?

And for number 2.

2.Write a program that will aloow a user to input an integer between 1 and 25(inclusive) and then print a line of asteriks (*), using a for loop, that uses the input value as the length of the line..

Example 1
Input: Please enter and integer from 1 to 25: 5
Output: *****

Example 2
Input: Please enter an integer from 1 to 25: 7
Output: *******

Help guys? This is in Java using Eclipse.

**BiG O** · 10-13-09

It would be helpful if you posted what you have so far. That way no one is actually doing this assignment for you. This is fairly simple stuff, so if you post what you've got so far, it won't be hard to help walk you through it.

[Teh Root] · 10-13-09

How do I create a string in Eclipse?

**BiG O** · 10-13-09

Quote:

Originally Posted by [Teh Root]

How do I create a string in Eclipse?

Creating a string is not based on what program you're using. It's simply java.

Code:

String str = new String("This is a String");

[Teh Root] · 10-13-09

but I have this.... for the first one...

import java.util.*;
public class names {
static Scanner Scanner = new Scanner(System.in);

/**
* @param args
*/
public static void main(String[] args) {
// TODO Auto-generated method stub
System.out.print("Enter A to print the name Alan: ");
string names = Scanner.nextString();
}

}

To enter a character is it string or a char?

[Teh Root] · 10-13-09

I only need to actually write the switch statement for the first one, the second one I have to write.

1337guy · 10-13-09

Buddy this is easy stuff, would help you but im on my cellphone now. Goodluck learning the java language! Its pretty neat,i just wrote my IT programming finals a few days ago (now that was crap i tell you!).
Cheers

**UberN00B** · 10-13-09

Quote:

Originally Posted by [Teh Root]

Hey guys, I;m currently taking a course in Java and I don't remember how to do this.

1. Write a swtich statement that follows the menu given below.
Enter A to print the name Alan
Enter B to print the name Bob
Enter C to print the name Carl
Enter D to print the name David
If anything else if entered print "Invalid Choice"

How would I do that?

And for number 2.

2.Write a program that will aloow a user to input an integer between 1 and 25(inclusive) and then print a line of asteriks (*), using a for loop, that uses the input value as the length of the line..

Example 1
Input: Please enter and integer from 1 to 25: 5
Output: *****

Example 2
Input: Please enter an integer from 1 to 25: 7
Output: *******

Help guys? This is in Java using Eclipse.

its been awhile since ive touched on java, so someone fix my syntax if im wrong.. ill only do the first one for you.

string letter = joptionpane.showInputDialog("Input whatever letter");
string lower = letter.toLowerCase();

if (lower==a)
System.out.println("Alan");
else if (lower == b)
System.out.println("Bob");

thats how you do the first one. relatively simple stuff.

the second one is just a loop where the user enters a number (15 for example) and you get that number using integer number = JOptionPane.showInputDialog("Whatever here");
then you use the variable "number" into a loop statement. You also need to create a counter (i use variable i) so that its like..

while(i<=number)
System.out.print("*") or something.

hope that helps.

[Teh Root] · 10-13-09

I suck at programming :P I'm into computer hardware design.

**BiG O** · 10-13-09

Quote:

Originally Posted by UberN00B

its been awhile since ive touched on java, so someone fix my syntax if im wrong.. ill only do the first one for you.

string letter = joptionpane.showInputDialog("Input whatever letter");
string lower = letter.toLowerCase();

if (lower==a)
System.out.println("Alan");
else if (lower == b)
System.out.println("Bob");

thats how you do the first one. relatively simple stuff.

the second one is just a loop where the user enters a number (15 for example) and you get that number using integer number = JOptionPane.showInputDialog("Whatever here");
then you use the variable "number" into a loop statement. You also need to create a counter (i use variable i) so that its like..

while(i<=number)
System.out.print("*") or something.

hope that helps.

There's a lot wrong with this one. You need to pay more attention to capitalization, OP. Also, you don't use == for strings, you use .equals().

Quote:

Originally Posted by [Teh Root]

but I have this.... for the first one...

import java.util.*;
public class names {
static Scanner Scanner = new Scanner(System.in);

/**
* @param args
*/
public static void main(String[] args) {
// TODO Auto-generated method stub
System.out.print("Enter A to print the name Alan: ");
string names = Scanner.nextString();
}

}

To enter a character is it string or a char?

Code:

import java.util.*;
public class names {
	static Scanner scanner = new Scanner(System.in);

	/**
	 * @param args
	 */
	public static void main(String[] args) {
		// TODO Auto-generated method stub
		System.out.print("Enter A to print the name Alan: ");
		String names = scanner.nextString();
                if (names.equals("A") || names.equals("a"){
                      System.out.println("Alan");
                }

	}

}

If fixed that one section for you.

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Help with Java programs.

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