多选题 Given:
59. Integer i1 = 2001; // set 1
60. Integer i2 = 2001;
61. System.out.println((i1 == i2) + " " + i1.equals(i2)); // output 1
62. Integer i3 = 21; // set 2
63. Integer i4 = new Integer(21);
64. System.out.println((i3 == i4) + " " + i3.equals(i4)); // output 2
65. Integer i5 = 21; // set 3
66. Integer i6 = 21;
67. System.out.println((i5 == i6) + " " + i5.equals(i6)); // output 3
What is the result? (Choose all that apply.)

A、 Compilation fails.
B、 An exception is thrown at runtime.
C、 All three sets of output will be the same.
D、 The last two sets of output will be the same.
E、 The first two sets of output will be the same.
F、 The first and last sets of output will be the same.

【正确答案】 E

【答案解析】