问题

I have 3 Array Lists as below, need to get all Lists those are with INDIVIDUAL using Java code

Array List: [08/16/2020 11:00, Y, INDIVIDUAL, Sam S, 2/15/1980, DOLLARS, Cash In]

Array List: [08/16/2020 11:00, Y, INDIVIDUAL, Sam S, 2/15/1980, DOLLARS, Cash In]

Array List: [08/16/2020 11:00, Y, INDIVIDUAL, Sam Kin, 2/15/1980, DOLLARS, Cash In]

Array List: [08/16/2020 11:00, Y, Business, King S, 2/15/1980, DOLLARS, Cash In]

From above I need to get INDIVIDUAL mentioned lists as output in Java code
Please help

答案1

得分: 1

假设`"INDIVIDUAL"`始终出现在索引2处：

```java
List<List<String>> individualLists = new ArrayList<>();
for (List<String> list: allLists) {
    if (list.get(2).equals("INDIVIDUAL")) {
        individualLists.add(list);
    }
}

<details>
<summary>英文:</summary>

Assuming `&quot;INDIVIDUAL&quot;` always appears at index 2:

```java
List&lt;List&lt;String&gt;&gt; individualLists = new ArrayList&lt;&gt;();
for (List&lt;String&gt; list: allLists) {
    if (list.get(2).equals(&quot;INDIVIDUAL&quot;)) {
        individualLists.add(list);
    }
}

答案2

得分: 0

如果`INDIVIDUAL`始终在索引2处，您可以使用以下函数：
```java
ArrayList<ArrayList<String>> filter(ArrayList<ArrayList<String>> lists){
    ArrayList<ArrayList<String>> out = new ArrayList<>();
    for(ArrayList<String> list : lists){
        if(list.get(2).equals("INDIVIDUAL"))
            out.add(list);
    }
    return out;
}

如果您不知道INDIVIDUAL的索引，请使用类似以下方式的函数替换if条件：

boolean isIndividual(ArrayList<String> list){
    for(String str: list){
        if(str.equals("INDIVIDUAL"))
            return true;
    }
    return false;
}

ArrayList<ArrayList<String>> filter(ArrayList<ArrayList<String>> lists){
    ArrayList<ArrayList<String>> out = new ArrayList<>();
    for(ArrayList<String> list : lists){
        if(list.get(2).equal("INDIVIDUAL"))
            out.add(list);
    }
    return out;
}

boolean isIndividual(ArrayList<String> list){
    for(String str: list){
        if(str.equal('INDIVIDUAL`) == TRUE)
            return True;
    }
    return False;
}