硬编码字符串有效,输入字符串无效
简而言之,这就是我想要做的:
我想读取一个文件并检测符号后面的字符是数字还是单词。如果是数字,我想删除它前面的符号,将数字翻译成二进制并替换到文件中。如果是一个单词,我想首先将字符设置为数字16,但是,如果使用另一个单词,我想将1添加到原始数字并继续循环,直到到达输入的末尾。
当我硬编码我想要输入和读取的字符串时:
String input = "@5\n@word1\n@word2\n@word1\n@6";
String[] lines = input.split("\n"); // divide up the array
或者:
@5
@word1
@word2
@word1
@6
然后它输出我想要输出的内容:
101
10000
10001
10000
110
但是当我输入anyLines[i](一个包含文件信息的数组,如果选择另一个文件,该文件信息可以更改) ):
String input = anyLines[i];
String[] lines = input.split("\n");
对于相同的数据,突然给出了错误的输出:
101
10000
10000 <-- PROBLEM - should be 10001
10000
110
现在的问题是 wordValue 不增加。在硬编码字符串中,wordValue 正确递增。
这是我的总体方法:
try {
ReadFile files = new ReadFile(file.getPath());
String[] anyLines = files.OpenFile();
int i;
// test if the program actually read the file
for (i=0; i<anyLines.length; i++) {
String input = anyLines[i];
String[] lines = input.split("\n");
int wordValue = 16; // to keep track words that are already used
Map<String, Integer> wordValueMap = new HashMap<String, Integer>();
for (String line : lines) {
// if line doesn't begin with "@", then ignore it
if ( ! line.startsWith("@")) {
continue;
}
// remove &
line = line.substring(1);
Integer binaryValue = null;
if (line.matches("\\d+")) {
binaryValue = Integer.parseInt(line);
}
else if (line.matches("\\w+")) {
binaryValue = wordValueMap.get(line);
// if the map doesn't contain the word value,
// then assign and store it
if (binaryValue == null) {
binaryValue = wordValue;
wordValueMap.put(line, binaryValue);
wordValue++;
}
}
// I'm using Commons Lang's
// StringUtils.leftPad(..) to create the zero padded string
System.out.println(Integer.toBinaryString(binaryValue));
}
}
}
您能给我指出正确的方向吗?
In a nutshell, here's what I'm trying to do:
I want to read a file and detect if the character after the symbol is a number or a word. If it is a number, I want to delete the symbol in front of it, translate the number into binary and replace it in the file. If it is a word, I want to set the characters to number 16 at first, but then, if another word is used, I want to add the 1 to the original number and continue looping till it reaches the end of the input.
When I hard code the string that I want to input and read:
String input = "@5\n@word1\n@word2\n@word1\n@6";
String[] lines = input.split("\n"); // divide up the array
Or:
@5
@word1
@word2
@word1
@6
Then it outputs what I want it to output:
101
10000
10001
10000
110
But when I input anyLines[i] (an array that contains the file info that can change if another file is chosen):
String input = anyLines[i];
String[] lines = input.split("\n");
For the same data, suddenly it gives an incorrect output:
101
10000
10000 <-- PROBLEM - should be 10001
10000
110
Now the problem with this is that the wordValue doesn't increment. In the hard-coded string, wordValue incremented correctly.
Here's my overall method:
try {
ReadFile files = new ReadFile(file.getPath());
String[] anyLines = files.OpenFile();
int i;
// test if the program actually read the file
for (i=0; i<anyLines.length; i++) {
String input = anyLines[i];
String[] lines = input.split("\n");
int wordValue = 16; // to keep track words that are already used
Map<String, Integer> wordValueMap = new HashMap<String, Integer>();
for (String line : lines) {
// if line doesn't begin with "@", then ignore it
if ( ! line.startsWith("@")) {
continue;
}
// remove &
line = line.substring(1);
Integer binaryValue = null;
if (line.matches("\\d+")) {
binaryValue = Integer.parseInt(line);
}
else if (line.matches("\\w+")) {
binaryValue = wordValueMap.get(line);
// if the map doesn't contain the word value,
// then assign and store it
if (binaryValue == null) {
binaryValue = wordValue;
wordValueMap.put(line, binaryValue);
wordValue++;
}
}
// I'm using Commons Lang's
// StringUtils.leftPad(..) to create the zero padded string
System.out.println(Integer.toBinaryString(binaryValue));
}
}
}
Can you point me in the right direction please?
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乍一看,代码看起来还不错。您最好的选择是在处理这些行时打印出这些行,看看它们是否具有……奇怪的……格式:
事实上,我会全力以赴,并在每行之后添加一个打印语句更改某些内容(打印序列号和更改的内容),以确保不会出现意外效果:
类似于:
这种
printf
调试方法通常非常有用,尽管您也可以选择使用调试工具:-)The code looks okay at first glance. Your best bet is to probably print out the lines as you process them to see if they're of a ... strange ... format:
In fact, I'd go all out, and put a print statement after every line that changes something (which prints a sequence number and the changed thing), so as to be sure there are no unintended effects:
Something like:
This
printf
method of debugging can often be invaluable though you could also chose to use a debugging tool :-)