我快要疯了。也许是因为我已经工作了 12 个小时......但是为什么我的 if 语句在运行时不会评估为真if (band.equals("4384")？我正在打印band到屏幕上，它正在阅读4384，但它不会评估为真。我已经多次使用 .equals() 没有问题，我做错了什么？
public class Test {
public static void main(String[] args) {
// TODO Auto-generated method stub
String endBand = " ";
String str = "SCELL: UARFCN 4384, Prim. SC: 362, RSCP: 70, EcNo: 44";
endBand = getBandNumber(str);
System.out.println("endBand is " + endBand);
}
// ************************************************
// Returns the current band that the device is on.
// Currently only coded for 3G
// ************************************************
private static String getBandNumber(String str) {
// The string returned to str will be in the form of:
// "SCELL: UARFCN 4384, Prim. SC: 362, RSCP: 73, EcNo: 33"
// ^^^^
// String str = read_AT("AT+XL1SET=\"IRATSCEL?\"", 10);
String band = " ";
int begin = 0, end = 0;
// Filter through the string to extrace the channel number
for (int i = 0; i < str.length(); i++) {
char c = str.charAt(i);
if (c == 'N' && str.charAt(i + 1) == ' ') {
begin = i + 1;
} else if (c == ',') {
end = i;
break;
}
}
band = str.substring(begin, end);
System.out.println("band is " + band);
if (band.equals("4384")) {
band = "5";
} else {
band = "2";
}
return band;
}
}