[英]Cannot invoke equals(String) on the primitive type int
我有一個包含航班號的文本文件,我的目標是讓此方法搜索該文本文件,並打印出所有帶有“航班號”的行。
public static void print_flight(int rcount,int[]reservation_code,int[]fl_number,String[]last_name,String[]first_name,String[]seat_type,double[]seat_cost)
{
int i, total=0;
String search_flight = "";
String output = "Enter the Flight Number you are searching for";
search_flight = JOptionPane.showInputDialog(null,
output, " ",
JOptionPane.QUESTION_MESSAGE);
for (i = 0; i <=rcount; ++i) {
//CHECK flight number
if(fl_number[i].equals(search_flight))//ERROR IS HERE
{
total+=fl_number[i]; //not sure if that is right
System.out.println(reservation_code[i]+" "+fl_number[i]+" "+last_name[i]+" "+first_name[i]+" "+seat_type[i]+" "+seat_cost[i]);
}
}
}
使用Integer.parseInt將其轉換為int值,然后使用==
比較兩個int值
int flight_number = Integer.parseInt(search_flight); //convert to int
if(fl_number[i] == flight_number)//compare two ints
通常沒有針對航班號執行的算術運算,因此應為String數組。
fl_number是一個int數組,而search_flight是一個String,您應該將其解析為int以使用fl_number
因此,fl_number [i] .equals(search_flight)
-> fl_number [i] == Integer.Parse(search_flight)
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