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  1. /* package whatever; // don't place package name! */
  2.  
  3. import java.util.*;
  4. import java.lang.*;
  5. import java.io.*;
  6.  
  7. /* Name of the class has to be "Main" only if the class is public. */
  8. class Ideone
  9. {
  10. 	public static void main (String[] args) throws java.lang.Exception
  11. 	{
  12. 		// your code goes here
  13. 		List<List<String>> list = new ArrayList<List<String>>() {{
  14. 			add( new ArrayList<String>(Arrays.asList("A", "B")) );
  15. 			add( new ArrayList<String>(Arrays.asList("C", "D")) );
  16. 		}};
  17.  
  18. 		System.out.println("\nlist dump!");
  19. 		for (List<String> sl : list) {
  20. 			for (String s : sl) {
  21. 				System.out.print(s);
  22. 			}
  23. 		}
  24.  
  25. 		// CLONE
  26. 		List<List<String>> clone = new ArrayList<>(list);
  27.  
  28. 		// REMOVE
  29. 		list.get(0).remove(1);
  30.  
  31. 		System.out.println("\nlist dump!!");
  32. 		for (List<String> sl : list) {
  33. 			for (String s : sl) {
  34. 				System.out.print(s);
  35. 			}
  36. 		}
  37.  
  38. 		System.out.println("\nclone dump!!");
  39. 		for (List<String> sl : clone) {
  40. 			for (String s : sl) {
  41. 				System.out.print(s);
  42. 			}
  43. 		}
  44. 	}
  45. }
Success #stdin #stdout 0.07s 380224KB
comments (?)
stdin
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Standard input is empty
stdout
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list dump!
ABCD
list dump!!
ACD
clone dump!!
ACD
https://ideone.com/kgQRRu
language:
Java (12.0.1)
created:
8 years ago
visibility:
public

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