Cd Chen's Services

請思考下列的程式，產生的結果為何??

public class TestString {

  public static void main(String args[]) {

    String str1 = "";

    String str2 = "";

    String str3 = new String();

    Object obj1 = str3;

    System.out.println("Q1: " + (str1 == str2));

    System.out.println("Q2: " + (str2 == str3));

    System.out.println("Q3: " + (obj1 == str3));

    System.out.println("Q4: " + (str3.equals(str1)));

    System.out.println("Q5: " + (str1.equals(obj1)));

  }

}