java实现oracle函数rpad和lpad

import junit.framework.TestCase;

public class StringTest extends TestCase{
	public void ntestRpad(){
		System.out.println(rpad("1",3,"0"));
	}
	public void testLpad(){
		System.out.println(lpad("1",3,"0"));
	}
	private String lpad(String s, int n, String replace) {
		while (s.length() < n) {
			s = replace+s;
		}
		return s;
	}
	private String rpad(String s, int n, String replace) {
		while (s.length() < n) {
			s = s+replace;
		}
		return s;
	}
}