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Solution of Q2 (Sign) - Free Response Question - 2023

The original question can be found at: https://apcentral.collegeboard.org/media/pdf/ap23-frq-comp-sci-a.pdf

Sign class

public class Sign {
    
    private String message;
    private int width;

    public Sign(String message, int width)
    {
        this.message= message;
        this.width= width;
    }
    
    public int numberOfLines()
    {
        int lines=1;
        String newMsg = message;
        
        if (message.isEmpty()) return 0;
        else
        {
            while (newMsg.length() > width)
            {
                newMsg = newMsg.substring(width);
                lines++;
            }
        }
        return lines;
    }
    
    public String getLines()
    {
        String lines=null;
        String newMsg = message;
        
        if (message.isEmpty()) return "null";
        else
        {
            while (newMsg.length() > width)
            {
                if (lines!=null) lines = lines+ newMsg.substring(0,width)+";";
                else lines =  newMsg.substring(0,width)+";";
                newMsg = newMsg.substring(width);
            }
            if (lines!=null)  lines = lines+ newMsg.substring(0);
            else lines = newMsg.substring(0);
        }
        return lines;
    }
}

Java project files (with Runner code):

• Sign.java
• SignRunner.java

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