比较并匹配文本文件中的readLine()和文本 [英] Compare and match readLine() and text in a text file
问题描述
我有一个文本文件,我打开文件并尝试将文本文件的内容与文本匹配。这是我的代码:
FileInputStream input = new FileInputStream(" BinaryFp.txt");
BufferedReader br = new BufferedReader(new InputStreamReader(输入));
for(int i = 1; i< 801; i ++)
{
pdtNo = br.readLine();
if(pdtNo ==" M5250")
System.out.println(" true");
else
System.out.println(" false");
}
问题是,我不知道为什么答案总是错误的。应该有1场比赛。我可以用任何方式比较M5250吗?文本文件中有文本?
I have a text file, i open the file and try to match the contents of the text file to a text. Here''s my code:
FileInputStream input = new FileInputStream ("BinaryFp.txt");
BufferedReader br = new BufferedReader(new InputStreamReader(input));
for(int i=1;i<801;i++)
{
pdtNo = br.readLine();
if(pdtNo=="M5250")
System.out.println("true");
else
System.out.println("false");
}
The problem is, i don''t know why the answer is always false. There should be 1 match. Is ther any way that i can compare "M5250" with text in the text file?
推荐答案
我有一个文本文件,我打开文件并尝试匹配文本文件的内容为文本。这是我的代码:
FileInputStream input = new FileInputStream(" BinaryFp.txt");
BufferedReader br = new BufferedReader(new InputStreamReader(输入));
for(int i = 1; i< 801; i ++)
{
pdtNo = br.readLine();
if(pdtNo ==" M5250")
System.out.println(" true");
else
System.out.println(" false");
}
问题是,我不知道为什么答案总是错误的。应该有1场比赛。我可以用任何方式比较M5250吗?文本文件中的文字?
I have a text file, i open the file and try to match the contents of the text file to a text. Here''s my code:
FileInputStream input = new FileInputStream ("BinaryFp.txt");
BufferedReader br = new BufferedReader(new InputStreamReader(input));
for(int i=1;i<801;i++)
{
pdtNo = br.readLine();
if(pdtNo=="M5250")
System.out.println("true");
else
System.out.println("false");
}
The problem is, i don''t know why the answer is always false. There should be 1 match. Is ther any way that i can compare "M5250" with text in the text file?
始终使用str.equals(otherString)来比较字符串。不要使用==。
Always use str.equals(otherString) for comparing strings. Do not use == for that.
始终使用str.equals(otherString)来比较字符串。不要使用==。
Always use str.equals(otherString) for comparing strings. Do not use == for that.
我尝试使用str.equals(otherString),但它不起作用> _<
I tried using str.equals(otherString), but it doesn''t works >_<
我尝试使用str.equals(otherString),但它不起作用> _<
I tried using str.equals(otherString), but it doesn''t works >_<
发布你的试用方式。
Post how you have tried it.
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