Java - println question

println prints strings only. However, Java will coerce a numeric variable into a string if you do a string operation. For example, your statement will work simply adding a null string ("") or a space (" ") at the beginning, and spacing out the numbers, such as:
String space=" ";
System.out.println(space+array[0]+space+array[1]+space+array[2]+space+ array[3]);

You can be more elegant by using a for loop and print the numbers on separate lines:
String space=" ";
for(int i=0;i<4;i++)System.out.println(space+array[i]);

for (int i = 0; i < array.length; i++) {
System.out.print(array[i]);
}