···

public static void main(String[] args) {
    int [] list = new int[6];
    list[0]=99;
    list[1]=85;
    list[2]=82;
    list[3]=63;
    list[4]=60;
   // list[5]=0;
  //  Arrays.sort(list,0,4);
  //  System.out.println(Arrays.toString(list));

    System.out.println("請輸入你要插入的成績");
    Scanner scanner = new Scanner(System.in);
    int value = scanner.nextInt();
    int index = list.length;
    for (int i = 0 ; i<list.length ; i++){
        if(value > list[i]){
            index = i;
            break;
        }
    }
    for(int i =list.length -1 ; i>index ; i --){
        list[i]=list[i-1];
    }
    list[index] = value;

    for (int i = list.length-1 ; i >=0 ; i--){
        System.out.println(list[i]+"\t");
    }
}

···