This page contains the source code of Java String isBlank() utility method - This method checks if a CharSequence is empty (""), null or whitespace only. This method similar to isEmpty()but additionally checks for whitespace.
Java String isBlank() Utility Method
The following String isBlank() utility method checks if a CharSequence is empty (""), null or whitespace only. This method similar to isEmpty()but additionally check for whitespace:
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))) {
return false;
}
}
return true;
}
JUnit test case for isBlank(final CharSequence cs) method:
@Test
public void isBlankTest() {
assertTrue(isBlank(null));
assertTrue(isBlank(""));
assertTrue(isBlank(" "));
assertFalse(isBlank("bob"));
assertFalse(isBlank(" bob "));
}
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