You should remove the references to it by assigning null or leaving the block where it was declared. After that, it will be automatically deleted by the garbage collector...
IT Nursery
You can add a jar in Eclipse by right-clicking on the Project → Build Path → Configure Build Path. Under Libraries tab, click Add Jars or Add External JARs...
“The import org.springframework cannot be resolved.”
That’s pretty easy: class Sample { private String message = null; private final Object lock = new Object(); public void newMessage(String x) { synchronized (lock) { message = x;...
I need to know how to fix these error notes: Note: Summer.java uses or overrides a deprecated API. Note: Recompile with -Xlint:deprecation for details. Here is my code: import...
Enums are classes and should follow the conventions for classes. Instances of an enum are constants and should follow the conventions for constants. So enum Fruit {APPLE, ORANGE, BANANA,...
why f is placed after float values?
Since Date implements Comparable, it has a compareTo method just like String does. So your custom Comparator could look like this: public class CustomComparator implements Comparator<MyObject> { @Override public int compare(MyObject o1, MyObject o2) { return o1.getStartDate().compareTo(o2.getStartDate()); }...
In Java, you cannot directly write the executable statements in class. You need to move your code in a method. Only variables declaration is allowed outside the method/blocks. Just...
Change this ArrayUtils.remove(listItems, i); to listItems = ArrayUtils.remove(listItems, i); As you can see in the JavaDoc, the method does not change the argument listItems, rather it returns a new array with...