打开csv集合和连续数组
我不太明白 opencsv 网站上给出的关于如何在此处使用集合列表的信息，例如：
CSVReader reader = new CSVReader(new FileReader("yourfile.csv"));**
List myEntries = reader.readAll();**
我尝试访问列表的成员，例如 System.out.println(myEntries.get(2)) 但它给了我类似 d1e604 的东西，当我测试元素是否存在时，
boolean b = myEntries.contains("the element");** and it returns false.
我需要做什么来访问标记化字符串？
通过使用 readNext()，元素由“\n”分隔，我想以连续的编号分配元素。的数组。
while((tokened = reader.readNext()) != null){
int numOfArray = tokened.length;
System.out.println("number of items:"+ numOfArray) ;
for (int i = 0;i < numOfArray;i++) {
System.out.println(" tokenNo[" + i + "]: " + tokened[i]);
}
}
i dont quite understand by the given eg on opencsv site on how to use collection here List,eg is:
CSVReader reader = new CSVReader(new FileReader("yourfile.csv"));**
List myEntries = reader.readAll();**
I tried accessing a member of the List for eg System.out.println(myEntries.get(2)) but it gives me something like d1e604 and when i tested for existence of an element
boolean b = myEntries.contains("the element");** and it returns false.
what do i need to do to access the tokenized Strings?
by using readNext(), the elements are separated by "\n" and i want to assign the elements in a continuous no. of array.
while((tokened = reader.readNext()) != null){
int numOfArray = tokened.length;
System.out.println("number of items:"+ numOfArray) ;
for (int i = 0;i < numOfArray;i++) {
System.out.println(" tokenNo[" + i + "]: " + tokened[i]);
}
}
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我认为您错过了有关 CSV 的一些事实。 CSV 是关于行和列的。
readNext()返回表示一行的字符串数组。所以我猜想，readAll()返回一个string[]列表。I think you missed a little fact about CSV. CSV is about lines AND columns.
readNext()returns an array of strings representing a line. So I would guess, readAll() returns a list of string[].List myEntries 的每个元素都是一个 String[]。
即这是一个字符串数组。
这意味着你需要演员阵容。
另外 -
那是因为 toString 方法没有被正确覆盖。这是 Object 类中实现的 toString 方法的默认行为。
Each element of your List myEntries is a String[].
i.e. That is an array of String.
that means you need a cast.
Also -
That's because the toString method is not properly overridden. That's the default behavior of the toString method as implemented in the Object class.