Collections Data Structure Java

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import java.util.Arrays;
public class Main {
  public static void main(String[] argv) throws Exception {
    boolean b = Arrays.equals(new String[] { "a" }, new String[] { "a" });
    b = Arrays.equals(new String[] { null }, new String[] { null }); 
    b = Arrays.equals(new String[] { "a" }, new String[] { null }); 
  }
}