public static boolean isAscii(char ch) {
        return ch < 128;
    }
<p>Checks whether the character is ASCII 7 bit.</p>

<pre>
  CharUtils.isAscii('a')  = true
  CharUtils.isAscii('A')  = true
  CharUtils.isAscii('3')  = true
  CharUtils.isAscii('-')  = true
  CharUtils.isAscii('\n') = true
  CharUtils.isAscii('&copy;') = false
</pre>

@param ch  the character to check
@return true if less than 128
android/android_framework/base/src/main/java/lang3/CharUtils.java