public class Test { public static void main(String[] args) { int a = Integer.parseInt(args[0]); int n = Integer.parseInt(args[1]); if( args[0].length() < n){ System.out.println("参数错误,n不能大于整数长度"); return; } int b = Integer.parseInt( args[0].substring(n-1,n) ); System.out.println( b%2 == 0 "偶数":"奇数"); } }