但是在 Java 中，一个字符（char）就是 2 个字节，占 4 个字节的字符，在 Java 里也是用两个 char 来存储的，而String的各种操作，都是以Java的字符（char）为单位的，charAt是取得第几个char，subString取的也是第几个到第几个char组成的子串，甚至length返回的都是char的个数。

但是在 Java 中，一个字符（char）就是 2 个字节，占 4 个字节的字符，在 Java 里也是用两个 char 来存储的，而String的各种操作，都是以Java的字符（char）为单位的，charAt是取得第几个char，subString取的也是第几个到第几个char组成的子串，甚至length返回的都是char的个数。

Here is a simple example of using the Java length () method to get the number of characters in a String: String simpleString = "Length example"; int listSize = simpleString.length(); Notice the round ...

JDK 7 changes this for Java by introducing the ability to switch on Strings. Specifically, Project Coin delivers on the promise of an ability to switch on Strings.

The input string contains 11 comma (,) characters, out of which three are inside substrings and four appear consecutively (as Today,,, makes two consecutive comma appearances, the first comma ...