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[英]Why is assert used in the Integer.valueOf method of the Integer class?
[英]Why an actual number string read from a text can't be parsed with method Integer.valueOf() in java?
为什么无法使用java中的方法Integer.valueOf()
解析从文本中读取的实际数字字符串?
例外 :
Exception in thread "main" java.lang.NumberFormatException: For input string: "11127"
at java.lang.NumberFormatException.forInputString(NumberFormatException.java:65)
at java.lang.Integer.parseInt(Integer.java:580)
at java.lang.Integer.valueOf(Integer.java:766)
at sharingBike.ReadTxt.readRecord(ReadTxt.java:91)
at sharingBike.ReadTxt.main(ReadTxt.java:17)
这是我的代码
File fileView = new File(filePath);
BufferedReader in = new BufferedReader(new InputStreamReader(new FileInputStream(fileView), "UTF-8"));
String line;
int count = 0;
while ((line = in.readLine()) != null) {
String[] lins = line.split(";");
int value;
value = Integer.valueOf(lins[0]);}
这是你的字符串的内容:
System.out.println(Arrays.toString("11127".getBytes()));
哪个输出:
[-17,-69,-65,49,49,49,50,55]
前三个字节是UTF-8 BOM 。
您可以通过首先从字符串中删除非数字来修复它(并使用parseInt
返回int
而不是Integer
):
int value = Integer.parseInt(lins[0].replaceAll("\\D", "");
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