122_leftPad.java

public class StringUtils {
    /**
     * @param originalStr the string we want to append to with spaces
     * @param size the target length of the string
     * @return a string
     */
    static public String leftPad(String originalStr, int size) {
        // Write your code here
        if(originalStr==null)
            return null;
        int length = originalStr.length();
        for(int i=0; i<size-length; i++){
            originalStr = " "+originalStr;
        }
        return originalStr;
    }

    /**
     * @param originalStr the string we want to append to
     * @param size the target length of the string
     * @param padChar the character to pad to the left side of the string
     * @return a string
     */
    static public String leftPad(String originalStr, int size, char padChar) {
        // Write your code here
        if(originalStr==null)
            return null;
        int length = originalStr.length();
         for(int i=0; i<size-length; i++){
            originalStr = padChar+originalStr;
        }
        return originalStr;
    }
}