求JAVA高手答疑解惑,写的代码没法运行答:public class Test4 { public static void main(String[] args) { int [] arr = {2,4,15,23,39,41,78};int index=getindex(arr,39);int [] arr1 ={26,1,7,34,77,9,81,109};int index_2=getindex_2(arr1,9);System.out.println(index);System.out.println(index_2);} publ...