public class Simpletext {
    public static void main(String[] args) {
        String[] aa = {"A", "b", "c"};
        f1(aa);
        f2(aa);
    } 

    private static final String RESULT_FORMAT="%5s+%5s+%5s=%-10s\n";
    public static void f1(String[] aa) {
        StringBuffer bb = new StringBuffer();
        for (String a3 : aa) {
            bb.append(a3);
        }
        System.out.print(String.format(RESULT_FORMAT, aa[0], aa[1], aa[2], bb.toString()));
    }

    public static void f2(String[] aa) {
        StringBuffer bb = new StringBuffer();
        for (String a3 : aa) {
            if (!a3.equals(aa[0]))
               System.out.print("+");
            bb.append(a3);
            for (int i=0; i<5-a3.length(); i++)
                System.out.print(" ");
            System.out.print(a3);
        }
        System.out.print("=" + bb.toString());
        System.out.println();
    }
}