Remove all the elements in set1 from set2 (set1 -= set2), set1 becomes the asymmetric difference of set1 and set2 : 设置 « 集合数据结构 « Java

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Java » 集合数据结构 » 设置屏幕截图 
Remove all the elements in set1 from set2 (set1 -= set2), set1 becomes the asymmetric difference of set1 and set2
  

import java.util.HashSet;
import java.util.Set;

public class Main {
  public static void main(String[] argv) throws Exception {
    Set set1 = new HashSet();
    Set set2 = new HashSet();

    set1.removeAll(set2);
  }
}

   
    
  
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