Testing a method

I have the following code and need to test my methods in class Violin. I only keep getting one line of output. I'm trying to test each element in the violins [] array and get output for each. This is for my first java programming class so I will apologize upfront for asking elementary questions.

Thanks
- Cory

Code:

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package corybrownp3;

public class Corybrownp3 {

   
        public static void main(String[] args) throws Exception{
           
            //declare violin object
            Violin violin1 = new Violin();
                     
           
            java.io.File file = new java.io.File("Corybrownp3test.txt");
           
            //check to see if file already exists
            if (file.exists())
            {
                System.out.println("File already exists");
                //System.exit(0);
            }
     
            //create a file
            java.io.PrintWriter output = new java.io.PrintWriter(file);
     
           
           
            //write test results to file
            output.println(violin1.playViolin());
            output.println(violin1.stopPlaying());
            output.println(violin1.tuneViolin());
       
            if (Violin.isTuned && Violin.isPlaying)
                System.out.println("The violin is tuned and playing!");
            else
                System.out.println("The violin is not playing, or it is not tuned.");
           
       
        }
       
       
}
       
     
class Violin
 {
    static boolean isTuned; //Violin starts off not tuned
    static boolean isPlaying; //Violin is not playing at start
     
    //array for Violin strings
    char [] violinStrings = {'E','A','D','G'};
     
    //default Violin object
    public Violin()
    {
        isTuned = false;
        isPlaying = false;
        //System.out.println("The violin is not playing, and it is not tuned.");
    }
     
    public Violin(boolean T, boolean P)
    {
        isTuned = T;
        isPlaying = P;
    }
     
    public boolean playViolin()
    {
        //System.out.println("The violin is playing!");
        return isPlaying = true;
    }
     
    public boolean stopPlaying()
    {
        //System.out.println("The violin has stopped playing.");
        return isPlaying = false;
    }
     
    public boolean tuneViolin()
    {
        //System.out.println("The violin is being tuned!");
        return isTuned = true;
    }
     
 

public class ViloinTest{
  public void main(String[] args){
   
        Violin[] violins;
       
        violins = new Violin[10]; 
       
            for(int i = 0; i < violins.length; i++){
                violins[i] = new Violin();
         
        }
               
        //Test Violin methods   
        for (int i = 0; i < violins.length; i++)
            System.out.println(Violin.isPlaying + " ");
         
  }
}
}

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Don't forget to close your PrintWriter object, output, after you're done writing to it.

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db

Quote:

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Originally Posted by DarrylBurke

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db

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Thanks, db.

Any takers on helping me out with this?

Your code looks good, except you need get rid of public from "public class ViloinTest", since there is only allowed PUBLIC class in a package.

Code:

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/*
 * To change this template, choose Tools | Templates
 * and open the template in the editor.
 */
package corybrownp3;

public class Corybrownp3 {
 
   
        public static void main(String[] args) throws Exception{
             
            //declare violin object
            Violin violin1 = new Violin();
                       
           
            java.io.File file = new java.io.File("Corybrownp3test.txt");
             
            //check to see if file already exists
            if (file.exists())
            {
                System.out.println("File already exists");
                //System.exit(0);
            }
     
            //create a file
            java.io.PrintWriter output = new java.io.PrintWriter(file);
     
           
             
            //write test results to file
            output.println(violin1.playViolin());
            output.println(violin1.stopPlaying());
            output.println(violin1.tuneViolin());
       
            if (Violin.isTuned && Violin.isPlaying)
                System.out.println("The violin is tuned and playing!");
            else
                System.out.println("The violin is not playing, or it is not tuned.");
           
       
        }
       
       
}
       
     
class Violin
 {
    static boolean isTuned; //Violin starts off not tuned
    static boolean isPlaying; //Violin is not playing at start
     
    //array for Violin strings
    char [] violinStrings = {'E','A','D','G'};
     
    //default Violin object
    public Violin()
    {
        isTuned = false;
        isPlaying = false;
        //System.out.println("The violin is not playing, and it is not tuned.");
    }
     
    public Violin(boolean T, boolean P)
    {
        isTuned = T;
        isPlaying = P;
    }
     
    public boolean playViolin()
    {
        //System.out.println("The violin is playing!");
        return isPlaying = true;
    }
     
    public boolean stopPlaying()
    {
        //System.out.println("The violin has stopped playing.");
        return isPlaying = false;
    }
     
    public boolean tuneViolin()
    {
        //System.out.println("The violin is being tuned!");
        return isTuned = true;
    }
 
}
 
 
 class ViloinTest{
  public void main(String[] args){
   
        Violin[] violins;
       
        violins = new Violin[10];
       
            for(int i = 0; i < violins.length; i++){
                violins[i] = new Violin();
       
    }
               
        //Test Violin methods 
        for (int i = 0; i < violins.length; i++)
            System.out.println(Violin.isPlaying + " ");
         
  }
}






The violin is not playing, or it is not tuned.
成功生成（总时间：6 秒）

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Ksharp