Johanna questions

• what does synchronization mean?
• Why does my icon handling code throw a NullPointerException?
• what is the value for main thread priority?
• Is there any relation between the class that implements interface and that interface?
• What is synchronized statement used for?
• How do I search for names starting wih A in MySQL?
• Should we use type cast for the object.toArray()?
• What is wrong with this clone()?
• Where to get com.sun.j3d classes
• Using command-line argument for passing files to a program

Johanna answers