Android Open Source - twawm2 My String Utlis

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License

The source code is released under:

Copyright (c) 2014, afnf All rights reserved. Redistribution and use in source and binary forms, with or without modification, are permitted provided that the following conditions are met: * Redistr...

Java Source Code

package com.appspot.afnf4199ga.utils;
/*  w w w  .  j  ava2  s .c  o  m*/
public class MyStringUtlis {

  public static boolean isEmpty(String str) {
    if (str == null) {
      return true;
    }
    else if (str.length() == 0) {
      return true;
    }
    else {
      return false;
    }
  }

  public static boolean eqauls(String s1, String s2) {
    boolean b1 = isEmpty(s1);
    boolean b2 = isEmpty(s2);
    if (b1 && b2) {
      return true;
    }
    else if (b1 || b2) {
      return false;
    }
    return s1.equals(s2);
  }

  public static String normalize(String str) {
    if (isEmpty(str)) {
      return "";
    }

    StringBuilder sb = new StringBuilder(str.length());
    char[] charArray = str.toCharArray();
    for (char d : charArray) {
      if (d == ' ' || d == '\t' || d == '\n' || d == '\r') {
        // do nothing
      }
      else if (d == '?') {
        sb.append(" ");
      }
      else {
        sb.append(d);
      }
    }
    return sb.toString();
  }

  public static int count(String str, char c) {
    if (isEmpty(str)) {
      return 0;
    }

    int count = 0;
    char[] charArray = str.toCharArray();
    for (char d : charArray) {
      if (d == c) {
        count++;
      }
    }
    return count;
  }

  public static String replaceFirst(String str, String from, String to) {
    if (isEmpty(str) || isEmpty(from)) {
      return str;
    }
    return str.replaceFirst(from, to != null ? to : "");
  }

  public static String subStringBefore(String str, String sep) {
    if (isEmpty(str)) {
      return "";
    }

    int pos = str.indexOf(sep);
    if (pos == -1) {
      return str;
    }
    else {
      return str.substring(0, pos);
    }
  }
}

Java Source Code List

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