Test116.java

▪️Test116.java
import java.io.*;

public class Test116 {
    static String s1;
    static BufferedReader br;

    public static void main(String[] args) throws IOException {
        BufferedReader br = new BufferedReader(new InputStreamReader(System.in));

        test1();

    }

    static void test1() throws IOException {
        System.out.println("針魚（サヨリ）は英語で？");
        System.out.println("1:needlefish 2:seerfish 3:mackerel 4:smelt");
        String s1 = br.readLine();
        if (s1.equals(1)) {
            System.out.println("正解");
        } else if (s1.equals(2)) {
            System.out.println("不正解");
        } else if (s1.equals(3)) {
            System.out.println("不正解");
        } else {
            System.out.println("不正解");
        }

    }
}


▪️Error Log
針魚（サヨリ）は英語で？
Exception in thread "main" 1:needlefish 2:seerfish 3:mackerel 4:smelt
java.lang.NullPointerException
    at Test116.test1(Test116.java:17)
    at Test116.main(Test116.java:10)