publicstaticvoidmain(String[]args){
int[]arr={1,3,5,7,9};
intnum=4;
intnewArray[]=newint[arr.length+1];
System.arraycopy(arr,0,newArray,0,arr.length);
newArray[newArray.length-1]=num;//此时数组最后一个元素的值变为num
for(inti=newArray.length-1;i>0;i--){//把数组下标最大值赋值给i,只要i大于等于数组最小下标就执行循环体
if(newArray |