Java String spilter

Question

我有一串国家缩写的注释,我想将它们分开,以便我可以识别每个缩写的国家.这样我将拥有String c = USA; 我将输出国家名称......

目前它没有c = USA但只有A

public class Example {

    public static void main(String[] args) {
        String x = "USAIND";

        String c = "";
        System.out.print("Country: ");
        for (int i = 0; i < 3; i++) {

            c = Character.toString(x.charAt(i));
            System.out.print(c);
            if (c.equals("USA")) {
                System.out.println("United State of America");
            }
        }
        System.out.println("");
        System.out.print("Country: ");
        for (int i = 3; i < 6; i++) {

            c = Character.toString(x.charAt(i));

            System.out.print(c);
            if (c.equals("IND")) {
                System.out.println("India");
            }
        }
        System.out.println("");

    }
}

Answer 1

你需要将每个字符附加到你的字符串然后比较它,否则,它将始终用最后一个字符替换你的字符串.

for (int i = 0; i < 3; i++) {
    c += Character.toString(x.charAt(i)); // Appending all the characters one by one
}

System.out.print(c); // Printing the String c after all the characters are appending

if (c.equals("USA")) { // checking if its equal to USA
    System.out.println("United State of America");
}

这个过程的另一半也是如此.

c = ""; // re-initialize it to blank
for (int i = 3; i < 6; i++) {
    c += Character.toString(x.charAt(i));
}
System.out.print(c);
if (c.equals("IND")) {
    System.out.println("India");
}

但最简单的方法是使用String.substring(startIndex, endIndex)它.

String c = x.substring(0,3); // For USA
String c1 = x.substring(3,6); // For IND