Welcome to DrJava.  Working directory is C:\cs12300
> int[] scores
> scores
null
> scores = new int[10]
{ 0, 0, 0, 0, 0, 0, 0, 0, 0, 0 }
> scores[6] = 12
12
> scores
{ 0, 0, 0, 0, 0, 0, 12, 0, 0, 0 }
> scores[0] = 0
0
> scores[1] = 1
1
> scores[2] = 2
2
> for (int i = 0; i < 10; i++) scores[i] = i;
> scores
{ 0, 1, 2, 3, 4, 5, 6, 7, 8, 9 }
> for (int i = 0; i < scores.length; i++) scores[i] = i;
> scores = new int[30]
{ 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0 }
> for (int i = 0; i < scores.length; i++) scores[i] = i;
> scores
{ 0, 1, 2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13, 14, 15, 16, 17, 18, 19, 20, 21, 22, 23, 24, 25, 26, 27, 28, 29 }
> int[] bob
> bob = scores  // two names for one array object
{ 0, 1, 2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13, 14, 15, 16, 17, 18, 19, 20, 21, 22, 23, 24, 25, 26, 27, 28, 29 }
> scores[20] = 1000  // change scores
1000
> bob                // check bob
{ 0, 1, 2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13, 14, 15, 16, 17, 18, 19, 1000, 21, 22, 23, 24, 25, 26, 27, 28, 29 }
> bob[10] = -12      // change bob
-12
> scores             // check scores
{ 0, 1, 2, 3, 4, 5, 6, 7, 8, 9, -12, 11, 12, 13, 14, 15, 16, 17, 18, 19, 1000, 21, 22, 23, 24, 25, 26, 27, 28, 29 }
> String[] s = new String[5]
> s
{ null, null, null, null, null }
> s[0] = "cat"
"cat"
> s[1] = "dog"
"dog"
> s
{ cat, dog, null, null, null }
> s[4] = "apple"
"apple"
> s
{ cat, dog, null, null, apple }
> s[3] = ""
""
> s
{ cat, dog, null, , apple }
> s[3] = "null"
"null"
> s
{ cat, dog, null, null, apple }
> s[4] = "123"
"123"
> s
{ cat, dog, null, null, 123 }
> s[2]
null
> s[3]    // s[2] and s[3] are not the same thing
"null"
> s[4]
"123"
> String[] s2 = {"hello", "world", "bye", "what"}
> s2
{ hello, world, bye, what }
> s2.length
4
> s2 = {"what", "bye"}   // not allowed
Invalid top level statement
> int[] a2;
> a2 = {3, 4, 5, 6}      // not allowed
Invalid top level statement
> int[] a3 = {3, 4, 5, 6}
> a3
{ 3, 4, 5, 6 }
>