问题

我想要统计在CSV文件中特定单词出现的次数，但我的代码不起作用，不幸的是，由于某种原因，我的调试在eclipse中无法工作，所以很难确定发生了什么。我可能走错了方向，但如果有人有经验，我会感激任何人的建议。这是我一直在尝试让它工作的方式。

FileReader po = new FileReader("filename");
Scanner underinvscan = new Scanner(po);

for (int i = 0; i < file.size(); i++) {
    String string = file.get(i).LOC;
    if (!(string.contains("Under investigation"))) {
        int count = 0;
        count++;

        System.out.println("there have been" + count + "under investigations");
    }
}

FileReader po = new FileReader("filename");
			Scanner underinvscan = new Scanner(po);
			
			
			for (int i = 0; i < file.size(); i++) {
				String string = file.get(i).LOC;
				if (!(string.contains("Under investigation"))) {
					int count = 0; count++;
				
					System.out.println("there have been" + count + "under investigations");
				
			
					}
				}
			}
		
	}

答案1

得分: 3

你需要将计数器移到循环外部，这样它就不会在每次循环中被重置：

int count = 0; 
for (int i = 0; i < file.size(); i++) {
    String string = file.get(i).LOC;
    if (!(string.contains("Under investigation"))) {
        count++;
    }
}
System.out.println("已经有" + count + "个调查进行中");

而且可能需要更改条件吗？如果你想要计算包含 "Under investigation" 的字符串，你需要从条件中删除 `!`，目前你正在计算不包含 "Under investigation" 的字符串。

<details>
<summary>英文:</summary>

You need to move the counter outside of the loop, so it is not reset in every loop:

            int count = 0; 
            for (int i = 0; i &lt; file.size(); i++) {
                String string = file.get(i).LOC;
                if (!(string.contains(&quot;Under investigation&quot;))) {
                    count++;
                }
            }
            System.out.println(&quot;there have been&quot; + count + &quot;under investigations&quot;);

And possible the condition? If you want to count the strings that contain the &quot;Under investigation&quot; you need to remove the `!` from the condition, currently you are counting the strings that do not contain the &quot;Under investigation&quot;.

</details>