Java Utililty Methods String Pad Left

if (str.length() >= len)
    return str;
StringBuilder ret = new StringBuilder();
while (ret.length() < len - str.length())
    ret.append(c);
return ret.append(str).toString();

return (leftPad(str, length, ' '));

if (str.length() >= length) {
    return str;
StringBuffer buf = new StringBuffer();
for (int i = 0; i < length - str.length(); i++) {
    buf.append(c);
buf.append(str);
...

final int paddingLength = length - str.length();
if (paddingLength < 0)
    return str;
final StringBuilder builder = new StringBuilder(length);
while (builder.length() < paddingLength)
    builder.append(padding);
builder.append(str);
return builder.toString();
...

if (str == null) {
    throw new NullPointerException("str should not be null");
if (maxLength < str.length()) {
    throw new IllegalArgumentException("str length should not be greater than: " + maxLength);
String temp = str;
while (temp.length() < maxLength) {
...

if (num <= 0) {
    return str;
StringBuilder sb = new StringBuilder(str.length() + num);
while (num-- > 0) {
    sb.append(padStr);
sb.append(str);
...

if (str == null)
    return null;
if (str.length() >= pad)
    return str;
int len = pad - str.length();
for (int i = 0; i < len; i++)
    str = " " + str;
return str;
...

return leftPad(str, size, ' ');

Left pad a String with spaces (' ').

return leftPad(str, size, ' ');

return leftPad(str, size, ' ');