package longcat;

public class Longcat {

    // Source: http://encyclopediadramatica.com/Longcat

    public static final String HEAD_ROW = "" +
            "    /\\___/\\         \n" +
            "   /       \\         \n" +
            "  |  #    # |         \n" +
            "  \\     @   |        \n" +
            "   \\   _|_ /         \n" +
            "   /       \\______   \n" +
            "  / _______ ___   \\  \n" +
            "  |_____   \\   \\__/ \n" +
            "   |    \\__/         \n";
    public static final String BODY_ROW = "" +
            "   |       |          \n";
    public static final String FEET_ROW = "" +
            "   /        \\        \n" +
            "  /   ____   \\       \n" +
            "  |  /    \\  |       \n" +
            "  | |      | |        \n" +
            " /  |      |  \\      \n" +
            " \\__/      \\__/     \n";

    private final int bodySize;

    public Longcat(int bodySize) {
        this.bodySize = bodySize;
    }

    public String getBody() {
        String body = "";
        for (int i = 0; i < bodySize; i++) {
            body += BODY_ROW;
        }
        return body;
    }

    public String toString() {
        return HEAD_ROW + getBody() + FEET_ROW;
    }
}

@@ -1044,16 +1044,23 @@
 ring
+Builder
  body = 
 %22%22;%0A
@@ -1055,18 +1055,35 @@
  body = 
-%22%22
+new StringBuilder()
 ;%0A      
@@ -1141,20 +1141,24 @@
 body
- += 
+.append(
 BODY_ROW
 ;%0A  
@@ -1149,24 +1149,25 @@
 end(BODY_ROW
+)
 ;%0A        %7D%0A
@@ -1185,16 +1185,27 @@
 urn body
+.toString()
 ;%0A    %7D%0A

Use StringBuilder to constructo the longcat body, as it can be very loooooooooong