JAVA运行java程序

程序代码：

public class f{
    public static void main(String[] args){
        String foo1 = args[1];
        String foo2 = args[2];
        String foo3 = args[3];
    }
}

C:\Users\yeqxiong\Desktop>javac f.java

C:\Users\yeqxiong\Desktop>java f 1 2 3

Exception in thread "main" java.lang.ArrayIndexOutOfBoundsException: 3 at f.main(f.java:5)

C:\Users\yeqxiong\Desktop>java f 1 2 3 4

C:\Users\yeqxiong\Desktop>