for loop - How do I output a square in Java with a character like * or something else using run as a method and with using return? -

i want output square example *. easy need use return command run method run test. square needs n x n big whereby n integer. problem dont know how variable. apparently need use unix newline character (dont know is). have this:

public static int run(int n) {      int n =       for(int row = 0; row!= ; row = row +1) {          for(int col = 0; col!= ; col = col + 1);             return     }  } } 

the original assignment looked this. need run junit tests. why need use method run in combination return command

now use for-loops output square of stars of n×n. value of n willbe provided argument typeint.to create new line in string, use unix newline character. example of square n = 4:

* * * *

* * * *

* * * *

* * * *

this test. says expects string. really confused now.

import org.junit.test;  import static org.junit.assert.*;  public class assignment1_5test {  @test public void getstarstest1() throws exception {     string expected = "*\n";     assertequals(expected, assignment1_5.run(1)); }  @test public void getstarstest2() throws exception {     string expected =             "**\n" +             "**\n";     assertequals(expected, assignment1_5.run(2)); }  @test public void getstarstest3() throws exception {     string expected =             "***\n" +             "***\n" +             "***\n";     assertequals(expected, assignment1_5.run(3)); } 

here example comments.

public class test {     public static void main(string[] args) {         //call method wrote main         system.out.println(run(4));     }      public static string run(int n) {         //you'll want use string variable can build on , add unix newline mentioned         //so return type of method string          string sq = "";         //go through n rows         (int row = 0; row < n; row++) {             //go through n columns             (int col = 0; col < n; col++) {                 sq = sq + "*";             }             //unix newline after each row complete             sq = sq + "\n";         }          //return string value         return sq;     } }