Notblank and notempty

lang and lang3 In bag StringUtils The difference between

public interface CharSequence {
    }

public final class String implements java.io.Serializable, Comparable<String>, CharSequence {
    }

commons-lang Official documents

isEmpty series

isEmpty

StringUtils.isEmpty(null) = true
StringUtils.isEmpty("") = true
StringUtils.isEmpty(" ") = false   // Note that there 
StringUtils.isEmpty(“bob”) = false
StringUtils.isEmpty(" bob ") = false


public static boolean isEmpty(final CharSequence cs) {
    
    return cs == null || cs.length() == 0;
}

isNotEmpty（）

public static boolean isNotEmpty(final CharSequence cs) {
    
    return !isEmpty(cs);
}

StringUtils.isAnyEmpty（）

StringUtils.isAnyEmpty(null) = true
StringUtils.isAnyEmpty(null, “foo”) = true
StringUtils.isAnyEmpty("", “bar”) = true
StringUtils.isAnyEmpty(“bob”, “”) = true
StringUtils.isAnyEmpty(" bob ", null) = true
StringUtils.isAnyEmpty(" ", “bar”) = false
StringUtils.isAnyEmpty(“foo”, “bar”) = false


public static boolean isAnyEmpty(final CharSequence... css) {
    
  if (ArrayUtils.isEmpty(css)) {
    
    return true;
  }
  for (final CharSequence cs : css){
    
    if (isEmpty(cs)) {
    
      return true;
    }
  }
  return false;
}

isNoneEmpty（）

public static boolean isNoneEmpty(final CharSequence... css) {
    }

isBank series

isBlank（） Whether it is vacuum value ( Space or null value )

StringUtils.isBlank(null) = true
StringUtils.isBlank("") = true
StringUtils.isBlank(" ") = true    // Note that there 
StringUtils.isBlank(“bob”) = false
StringUtils.isBlank(" bob ") = false

public static boolean isBlank(final CharSequence cs) {
    
    int strLen;
    if (cs == null || (strLen = cs.length()) == 0) {
    
        return true;
    }
    for (int i = 0; i < strLen; i++) {
    
        if (Character.isWhitespace(cs.charAt(i)) == false) {
    
            return false;
        }
    }
    return true;
}

isNotBlank（）

public static boolean isNotBlank(final CharSequence cs) {
    
   return !isBlank(cs);
 }

isAnyBlank（）

StringUtils.isAnyBlank(null) = true
StringUtils.isAnyBlank(null, “foo”) = true
StringUtils.isAnyBlank(null, null) = true
StringUtils.isAnyBlank("", “bar”) = true
StringUtils.isAnyBlank(“bob”, “”) = true
StringUtils.isAnyBlank(" bob ", null) = true
StringUtils.isAnyBlank(" ", “bar”) = true
StringUtils.isAnyBlank(“foo”, “bar”) = false


public static boolean isAnyBlank(final CharSequence... css) {
    
  if (ArrayUtils.isEmpty(css)) {
    
    return true;
  }
  for (final CharSequence cs : css){
    
    if (isBlank(cs)) {
    
      return true;
    }
  }
  return false;
}

isNoneBlank（）

StringUtils.isNoneBlank(null) = false
StringUtils.isNoneBlank(null, “foo”) = false
StringUtils.isNoneBlank(null, null) = false
StringUtils.isNoneBlank("", “bar”) = false
StringUtils.isNoneBlank(“bob”, “”) = false
StringUtils.isNoneBlank(" bob ", null) = false
StringUtils.isNoneBlank(" ", “bar”) = false
StringUtils.isNoneBlank(“foo”, “bar”) = true


public static boolean isNoneBlank(final CharSequence... css) {
    
	return !isAnyBlank(css);
}

Other methods