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Thread: (Simple) How to use an if statement to respond to random integers

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    Member DusteroftheCentury's Avatar
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    Default (Simple) How to use an if statement to respond to random integers

    Hello,

    I have a simple question. How do I use an if statement to check and respond to a randomly generated integer? For instance if the number is 4, it would print "Chicken"
    but for 5 it would print "Steak" and so on. Is their a simple way to do this?

    Thanks.


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    Default Re: (Simple) How to use an if statement to respond to random integers

    Well first you have to generate a random number, which can be done in the Random class, then you simply compare the int it returns with either a switch statement or if statement.

    The switch Statement (The Java™ Tutorials > Learning the Java Language > Language Basics)

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    DusteroftheCentury (January 27th, 2012)

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    Default Re: (Simple) How to use an if statement to respond to random integers

    Quote Originally Posted by DusteroftheCentury View Post
    Hello,

    I have a simple question. How do I use an if statement to check and respond to a randomly generated integer? For instance if the number is 4, it would print "Chicken"
    but for 5 it would print "Steak" and so on. Is their a simple way to do this?

    Thanks.
    By randomly generated integer, you mean within some range, right? Also, is there any behavior of your program to print a certain statement in particular conditions or it's iterative? Means it will print different String at different Integers?
    Well, in any case you must stick to switch and if.

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    Default Re: (Simple) How to use an if statement to respond to random integers

    Alternately, you could use an array that has predefined values, and then just tell the program to print out the value of the array at a random index.
    Use highlight tags to help others help you!

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    Using these tags makes your code formatted, and helps everyone answer your questions more easily!




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    Default Re: (Simple) How to use an if statement to respond to random integers

    Thanks guys.

    Tjstretches link did it for me. Thanks for helping

    Also for a related issue,(Part of same code) how do I change the text of a JLabel when I am in a different block of code? It seems to not recognize it unless it is in the same block. Is their a simple work around?

    -Duster
    Last edited by DusteroftheCentury; January 27th, 2012 at 06:22 PM.

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    Default Re: (Simple) How to use an if statement to respond to random integers

    What do you mean by block of code? Are you talking about code with a pair of {} within a method
    or do you mean a class?
    You need a reference to the component whose methods you want to call.

    Post a small piece of code to show what you are trying to do.

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    Member DusteroftheCentury's Avatar
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    Default Re: (Simple) How to use an if statement to respond to random integers

    Quote Originally Posted by Norm View Post
    What do you mean by block of code? Are you talking about code with a pair of {} within a method
    ^this

    Here is the peice of code Im talking about:
    public void actionPerformed(ActionEvent e)
    {
    	if (e.getSource() == button1);
    		{
    		int low = 1;
    		int high = 5;
    		int rnd = (int)(Math.random() * (high - low + 1)) + low;
    		if (textbox1.getText().equals("Hi"))
    		//For all the printlns I would like something like label1.setText("Hello"), while keeping label1 created in the main code for the panel if possible
     
    		{
    			if (rnd == 1)
    			System.out.println("Hello.");
    		}	
    		{
    			if (rnd == 2)
    			System.out.println("Greetings!");
    		}
    		{
    			if (rnd == 3)
    			System.out.println("Salutations.");
    		}
    		{
    			if (rnd == 4)
    			System.out.println("Hey there.");
    		}
    		{
    			if (rnd == 5)
    			System.out.println("Whats up?");
    		}
    		}
    	}
    }

    Thanks for helping,

    -Duster

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    Default Re: (Simple) How to use an if statement to respond to random integers

    That is called a method.

    You need to move the definition of the variable out of a method to the class level so all methods can see it.
    You can then give it values or call its methods in any method.
    Last edited by Norm; January 27th, 2012 at 07:24 PM.

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    DusteroftheCentury (January 27th, 2012)

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    Default Re: (Simple) How to use an if statement to respond to random integers

    Thanks Norm that worked like a charm!

    Also thanks for the definition, I hat not being able to use proper terms.

    Thanks so much for the simple explanation!

    -Duster

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    Default Re: (Simple) How to use an if statement to respond to random integers

    Getting the right vocabulary can be important. There are many terms and techniques in IT with their own names.
    You'll be able to ask better questions with the right word.

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