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• caelum-stella-boleto
• 2.1.1
• source code
• StellaStringUtils.java

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br.com.caelum.stella.boleto.utils.StellaStringUtils Maven / Gradle / Ivy

package br.com.caelum.stella.boleto.utils;

public class StellaStringUtils {
	
	private static final String ZERO = "0";
	
	public static String leftPadWithZeros(String input, int expectedSize){
		if( input == null ) {
			return leftPadWithZeros("", expectedSize);
		}
		
		StringBuilder sb = new StringBuilder(expectedSize);
		
		for (int i = expectedSize - input.length(); i>0; i-- ){
			sb.append(ZERO);
		}
		
		sb.append(input);
		return sb.toString();
	}
}