double mark;

double [20] mark = new double;

double [ ] mark = new mark [20];

double [ ] mark = new double [20];

String [ ] name = new String;

String [ ] name = new String [15];

name = new String [15];

String [15] name = new String [ ];

int [ ] id = new {115331, 450055, 555641, 875560, 987555};

int [5] id = {115331, 450055, 555641, 875560, 987555};

int [ ] id = {115331, 450055, 555641, 875560, 987555};

int [ ] id = new int [5];

char [ ] code = {'S', 'M', 'C', 'P', 'I' and 'K'};

char [ ] code = {S, M, C, P, I, K};

char [ ] code = {"S", "M", "C", "P", "I", "K"};

char [ ] code = {'S', 'M', 'C', 'P', 'I', 'K'};

System.out.println("The size is " + studentname[ index ]);

System.out.println("The size is " + studentname.length);

System.out.println("The size is " + length.length);

System.out.println("The size is " + studentname);