我对编程几乎是全新的。我正在学习第二个大学类(class)。我花了几个小时在网上和这里寻求帮助。我必须按年份对工资进行排序并将它们加在一起。我以为我可以做一个 if 语句将工资排序到不同的数组中，但它似乎不起作用。正如您从代码输出中看到的，它显示了无效的年份，但它也弹出年份是 2014 年。我正在读取的文件遵循以下格式: 2014 Employee Smith,John 2000 0(这是一行，还有 9 行类似)。 感谢您的帮助和建议。
public class JohnSummersProject1 {
public static void main(String[] args) {
int count = 0;
String[] year = new String[10];
String[][] employeeType = new String[10][2];
String[][] name = new String [10][2];
String[][] monthlySalary = new String [10][2];
String[][] micellanious = new String[10][2];
String line = "";
String splitBy = " ";
BufferedReader inputStream = null;
String[] input = new String[5];
String year2014 = "2014";
try {
String x = (args[0]);
inputStream = new BufferedReader(new FileReader(x));
while ((line = inputStream.readLine()) != null && line.length()!=0) {
input = line.split(splitBy);
year[count] = input[0];
employeeType[count][0] = input[1];
if(year[count] == year2014){
name[count][0] = input[2];
monthlySalary[count][0] = input[3];
micellanious[count][0] = input[4];
System.out.print(year[count] + " ");
System.out.print(employeeType[count][0] + " ");
System.out.print(name[count][0] + " ");
System.out.print(monthlySalary[count][0] + " ");
System.out.println(micellanious[count][0]);
}
else if(year[count] == "2015"){
employeeType[count][1] = input[1];
name[count][1] = input[2];
monthlySalary[count][1] = input[3];
micellanious[count][1] = input[4];
System.out.print(year[count] + " ");
System.out.print(employeeType[count][1] + " ");
System.out.print(name[count][1] + " ");
System.out.print(monthlySalary[count][1] + " ");
System.out.println(micellanious[count][1]);
}
else{
System.out.println("Invalid year");
}
count++;
}
}
catch (IOException io) {
System.out.println("File IO exception" + io.getMessage());
System.exit(0);
} finally {
try {
if (inputStream != null) {
inputStream.close();
}
} catch (IOException io) {
System.out.println("Issue closing the Files" + io.getMessage());
}
}
for(int i = 0; i <year.length; i++){
System.out.println("Year " + year[i] + " Employee type = " +
employeeType[i][0] + " Name: " + name[i] + " Monthly count = " +
monthlySalary[i][0] + "extras: " + micellanious[i][0]);
}
}
} It shows invalid year, but below it shows that the year is in fact 2014
最佳答案
你需要使用方法来比较字符串，你不能使用 == 来比较它们
改变
if(year[count] == "2015")
至
if(year[count].equalsIgnoreCase("2015"))
以及基于此示例的其他 if 语句
关于java - 如何在读取文件时使用 if 语句？，我们在Stack Overflow上找到一个类似的问题： https://stackoverflow.com/questions/52133428/