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[已解决]否则如果总是从文件读取时执行
通过添加是否已达到语句的标记来修复它。
if(contains) // condition reached. marker "found" is 1.
found = 1;
else if(found != 1){ // If found is not 1, not found. break.
System.out.println("Not found"); break;
编写一个程序,包括读取从一个文件的示例SSN。我试图说明无效输入(即字符串不在文件内)。但是,这些陈述并未执行我想要的方式。 (忽略一切,但我的if语句是如何构造的)。
public static void getNameNum(String SocSec_input){
try{
reader1 = new BufferedReader(new FileReader("src\\DEPARTMENT.txt"));
reader2 = new BufferedReader(new FileReader("src\\EMPLOYEE.txt"));
/**
* reads from employee text file
*/
while((curr = reader2.readLine()) != null){
/**
* checks which lines contain user input and split the name from the code into storage
*/
if(curr.contains(SocSec_input)){
String[] parts = curr.split(",");
String FNAME = parts[0];
String LNAME = parts[1];
String SSN = parts[2];
String DNO = parts[9];
if(SSN.equals(SocSec_input)){
while((curr = reader1.readLine()) != null){
/**
* searches the file for the user input
*/
if(curr.contains(DNO)){
/**
* splits the line containing user input at each comma and store the values
*/
String[] parts2 = curr.split(",");
String DNAME = parts2[0];
String DNUMBER = parts2[1];
if(DNUMBER.equals(DNO))
System.out.println(FNAME + " " + LNAME + " works in department " + DNO + ", " + DNAME);
}
}
}
}
// ALWAYS EXECUTING STATEMENT HERE*****************
else if(!(curr.contains(SocSec_input))){
System.out.println("Invalid SSN entered. We could not find
that SSN in our database.");
break;
}
}
}
catch (IOException e){
e.printStackTrace();
}
}
输出:
Please enter the employee's SSN: 123
Invalid SSN entered. We could not find that SSN in our database.
Please enter the employee's SSN: 888665555
Invalid SSN entered. We could not find that SSN in our database.
--------------------
但888665555是在文件中!到底是怎么回事?
检查你尝试使用字符串上CURR格式,以确保您的字符串是你认为他们是谁? – Tosh
@Tosh感谢您的快速回复,您是什么意思的字符串格式? – pmcg521
基本上做了一些快速调试,可以像几个打印语句一样简单,以确保您认为您使用的字符串与计算机传递的字符串相同,如果不是,则使用类似字符串的字符串.format可以让你的字符串看起来像你期望的那样 – Tosh