If ArrayList is empty
boolean isEmpty()
- Returns true if this list contains no elements.
import java.util.ArrayList;
public class Main {
public static void main(String args[]) {
ArrayList<String> al = new ArrayList<String>();
al.add("C");
al.add("java2s.com");
al.add("D");
al.add("F");
al.add(1, "java2s.com");
System.out.println(al.isEmpty());
al.clear();
System.out.println(al.isEmpty());
}
}
The output:
false
true
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Java Book
Collection
ArrayList:
- ArrayList Class
- Create ArrayList object
- Add to ArrayList
- Clear an ArrayList
- Shallow copy of current ArrayList
- If contain a certain object
- Increases the capacity of an ArrayList
- Get/Replace element by index
- Get object for index
- Remove from ArrayList
- Get the size and trim to size
- If ArrayList is empty
- Convert ArrayList to array