java 在java中读取文件时忽略一行
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Ignore a line while reading a file in java
提问by cMinor
I have some code to read the lines from a file, I would like to recognize when the line starts or the fisrt character (not blank) is '*' and ignore it, so inside the while statement add something like
我有一些代码可以从文件中读取行，我想识别该行何时开始或第一个字符（非空白）是 ' *' 并忽略它，因此在 while 语句中添加类似
if(line[0]=='*')
ignore that line
I have something like:
我有类似的东西：
input = new BufferedReader(new FileReader(new File(finaName)));
String line = null;
while ((line = input.readLine()) != null) {
String[] words = line.split(" ");
....
}
How to complete the code?
如何完成代码？
回答by David Weiser
input = new BufferedReader(new FileReader(new File(finaName)));
String line = null;
while ((line = input.readLine()) != null) {
if(line.trim().indexOf('*') == 0)
continue;
String[] words = line.split(" ");
....
}
回答by Suresh Kumar
Change your while loop as:
将您的 while 循环更改为：
while((line = input.readLine()) != null){
if(!line.startsWith("*")){
String[] words = line.split(" ");
....
}
}
EDIT
编辑
If "*" is not in the beginning of the line but at some position in the line, use the following
如果“*”不在行首而是在行中的某个位置，请使用以下内容
if(line.indexOf("*") == position){
......
}
where position can be an integer specifying the position you are interested in.
其中 position 可以是一个整数，指定您感兴趣的位置。
回答by kieve
Assuming the * marks and end of line comment, this loop will keep anything needed on the line before it.
假设有 * 标记和行尾注释，这个循环会在它之前的行中保留任何需要的东西。
input = new BufferedReader(new FileReader(new File(finaName)));
String line = null;
char[] lineChars;
while ((line = input.readLine()) != null) {
lineChars = line.toCharArray();
line = "";
for(char c: lineChars){
if(c == '*')break;
line.concat(Character.toString(c));
}
if(!line.equals(""))
String[] words = line.split(" ");
}
