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  1. import java.util.*;
  2. import java.lang.*;
  3. import java.io.*;
  4.  
  5. import java.util.Arrays;
  6.  
  7. class Ideone {
  8.   public static void main (String[] args) throws java.lang.Exception {
  9.     Data[] data = new Data[10];
  10.     for (int i = 0; i < data.length; ++i) {
  11.       data[i] = new Data(i);
  12.     }
  13.  
  14.     System.out.println(Arrays.toString(data));
  15.     Data singleEntryInData = data[0];
  16.  
  17.     Data[] copy = Arrays.copyOf(data, data.length);
  18.  
  19.     System.out.println(Arrays.toString(copy));
  20.  
  21.     singleEntryInData.setValue(100);
  22.     System.out.println(Arrays.toString(copy));
  23.   }
  24. }
  25.  
  26. class Data implements Cloneable {
  27.   int value;
  28.  
  29.   public Data(Data that) {
  30.     this.setValue(that.getValue());
  31.   }
  32.  
  33.   public Data(int value) {
  34.     this.setValue(value);
  35.   }
  36.  
  37.   public void setValue(int value) {
  38.     this.value = value;
  39.   }
  40.  
  41.   public int getValue() {
  42.     return this.value;
  43.   }
  44.  
  45.   @Override
  46.   public String toString() {
  47.     return "{val=" + this.getValue() + "}";
  48.   }
  49.  
  50.   @Override
  51.   public Object clone() {
  52.     return new Data(this);
  53.   }
  54. }
Success #stdin #stdout 0.05s 27844KB
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[{val=0}, {val=1}, {val=2}, {val=3}, {val=4}, {val=5}, {val=6}, {val=7}, {val=8}, {val=9}]
[{val=0}, {val=1}, {val=2}, {val=3}, {val=4}, {val=5}, {val=6}, {val=7}, {val=8}, {val=9}]
[{val=100}, {val=1}, {val=2}, {val=3}, {val=4}, {val=5}, {val=6}, {val=7}, {val=8}, {val=9}]
https://ideone.com/IFU76W
language:
Java (HotSpot 12)
created:
7 years ago
visibility:
public

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