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// A Java program to convert an ArrayList to arr[] import java.io.*; import java.util.List; import java.util.ArrayList; class GFG { public static void main(String[] args) { List<Integer> al = new ArrayList<Integer>(); al.add(10); al.add(20); al.add(30); al.add(40); Integer[] arr = null; arr = al.toArray(arr); } }
https://ide.geeksforgeeks.org/jHrQBh
Exception in thread "main" java.lang.NullPointerException at java.util.ArrayList.toArray(ArrayList.java:405) at GFG.main(File.java:17)
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