Remove leading and trailing whitespace from a CharSequence - Android java.lang

Android examples for java.lang:String Strip

  1. HOME
  2. Android
  3. java.lang
  4. String Strip

Description

Remove leading and trailing whitespace from a CharSequence

Demo Code

import android.support.annotation.NonNull;
import android.support.annotation.Nullable;
import android.text.TextUtils;
import java.io.UnsupportedEncodingException;
import java.security.MessageDigest;
import java.security.NoSuchAlgorithmException;
import java.util.ArrayList;
import java.util.Arrays;
import java.util.Collections;
import java.util.List;

public class Main{

    /**/* w  w w.ja  v a2s  .co  m*/
     * Remove leading and trailing whitespace from a CharSequence. 
     * @param str CharSequence to be trimmed.
     * @return The trimmed CharSequence.
     */
    public static CharSequence trim(CharSequence str) {
        if (str == null || str.length() == 0) {
            return "";
        }
        int len = str.length();
        int start = 0;
        int end = len - 1;
        while (Character.isWhitespace(str.charAt(start)) && start < len) {
            start++;
        }
        while (Character.isWhitespace(str.charAt(end)) && end > 0) {
            end--;
        }
        if (end > start) {
            return str.subSequence(start, end + 1);
        }
        return "";
    }

}

Related Tutorials