java split 步骤的用法

java split 方法的用法
String str="aa|bb|cc|||dd|||";
要拆成这样
String[] fields = LINE_KEY.split("\\|", -1);
fields[0] = "aa"
fields[1] = "bb"
fields[2] = "cc"
fields[3] = ""
fields[4] = ""
fields[5] = "dd"
fields[6] = ""
fields[7] = ""