Return String from values in int array

Hi
I am very new to Java and have been asked to carry out the following task.
Returns a string version of counterGroups. For each
group it gives its number (1 more than its index) and (in
parentheses) the number of counters currently in that group.
Each is followed by two spaces. Thus if there are 3 groups
with 7, 9 and 11 counters the string returned is
"1(7) 2(9) 3(11) "
I have created an array of type int referenced by counterGroups. It stores values 7,9 and 11.
I have made a start on my method but I am struggling. Any help would be appreciated. Please see my method below to see how far I have got. It does not compile.
public String toStr()
String output1;
String temp;
String other;
for (int i=0; i<counterGroups.length(); i++)
int num1 = counterGroups;
output1 = String.valueOf(num1);
other = "(" + output1 + ")";
temp =
int num1 = counterGroups[0];
output1 = String.valueOf(num1);
return "(" + output1 + ")";
regards
Paul

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