Bud Tippins

I have the following code. I am trying to obtain the value for the main thread's priority level.

On line # 22 I'm getting an error (from NetBeans) saying that "cannot find symbol - symbol: variable main"

What do I need to change to get main's priority level to be printed?

Any help greatly appreciated. Thank you.


package practice6; class Threadtest extends Thread { public void run() { for (int i = 1; i < 100; i++) { if (i%10 == 0) { System.out.println("i is " + i); } try { Thread.sleep(100); } catch (InterruptedException ex) {} } } } public class Practice6 { public static void main(String[] args) { Threadtest tt = new Threadtest(); tt.setPriority(9); tt.start(); System.out.println("main's priority is " + main.getPriority()); for (int i = 1; i < 100; i++) { if (i%10 == 0) { System.out.println("j is " + i); } try { Thread.sleep(100); } catch (InterruptedException ex) {} } } }

I'm getting the following error when I try to run the code below in NetBeans:
Exception in thread "main" java.lang.ExceptionInInitializerError
at Practice16.main(Practice16.java:13)
Caused by: java.lang.RuntimeException: Uncompilable source code - Dog is not abstract and does not override abstract method compareTo(java.lang.Object) in java.lang.Comparable
at Dog.<clinit>(Practice16.java:3)

Any help in explaining why I am getting this error and how to resolve it would be much appreciated.

Thank you,


import java.util.*; class Dog implements Comparable { int size; Dog(int s) { size = s;} } public class Practice16 { public static void main(String[] args) { TreeSet<Integer> i = new TreeSet<Integer>(); TreeSet<Dog> d = new TreeSet<Dog>(); d.add(new Dog(1)); d.add(new Dog(2)); d.add(new Dog(1)); i.add(1); i.add(2); i.add(1); System.out.println(d.size() + " " + i.size()); } }

Thanks guys. Based on your comments I got it fixed.

I'm getting an error "exception java.io.IOException is never thrown in body of corresponding try statement" on line #16.

What is wrong with my code? Any insights appreciated. Thank you.


package practice2; import java.io.*; public class Practice2 { public static void main(String[] args) { Practice2 p2 = new Practice2(); p2.go(); } void go() { try { File myDir = new File("myDir"); myDir.mkdir(); } catch(IOException e){ } } }

Thank you for your help with this. It's working now.

I'm getting an error on the following code on line # 19 that says "cannot find symbol IOException"

What am I missing? Any help greatly appreciated.


package practice2; import java.io.*; public class Practice2 { public static void main(String[] args) { Practice2 p2 = new Practice2(); p2.go(); } void go() { File file = new File("testfile1.txt"); try { PrintWriter pw = new PrintWriter(file); pw.println("This is a test."); pw.flush(); pw.close(); } catch(IOexception e){ } } }

Thank you all for your help.

I'm getting an error when I try to declare a method that throws en exception. The error that NetBeans shows on line #13 is "illegal start of expression." What is wrong with line #13?

Any help greatly appreciated.



package practicestuff; public class PracticeStuff { public static void main (String [] args) { PracticeStuff ps = new PracticeStuff(); String foodeaten = "Brocolli"; try { ps.checkFood(foodeaten); } catch(BadFoodException be) { System.out.println(foodeaten + " was bad!"); } public void checkFood(String food) throws BadFoodException { If (food == "Brocolli"){ System.out.println("hello"); //throw BadFoodException(); } } } class BadFoodException extends Exception { }

Now I found it. Thank you. I populated it with a value and then ran and got the following error:

Exception in thread "main" java.lang.ArrayIndexOutOfBoundsException: 0
at practicestuff.PracticeStuff.main(PracticeStuff.java:7)
Java Result: 1

It seems like the jvm is not receiveing the parameter? Any help greatly appreciated.

Thank you.

What is the menu navigational path to get to 'project properties"?

Thank you.

I'm trying to run a program from NetBeans that takes a parameter for main when the program first starts. How can I pass that parameter to NetBeans? I'm using "run" but do not see any way to pass it a parameter.

Any help greatly appreciated.

Thank you.

package practicestuff; public class PracticeStuff { public static void main (String [] args) { PracticeStuff ps = new PracticeStuff(); try { ps.checkFood(args[0]); } catch(BadFoodException be) { System.out.println(args[0] + " was bad!"); } finally { } } public void checkFood(String food) throws BadFoodException { System.out.println(food + " was good. I want more!"); } } class BadFoodException extends Exception { }

Krishna, are you still looking for people for this? I am available and will send you more information if you are still looking for people. Thank you.

Can someone explain, in simple terms what is a hash code? Thank you.

Thank you all for all of your help. I finally got it working!

Joanne, Thanks for your help. I don't believe that it does. I've attached a screenshot of the file. How do I go about creating that directory and putting BeatBoxGui.class file in that directory of the jar file? (I've since renamed this to BeatBoxSaveOnly).