java 数组 插入算法

public class 插入算法 {
public static void main(String[] args) {
int [ ] musics = {12,23,89,77};
int [ ] newMusics =new int[musics.length+1];//新歌曲数组

    System.arraycopy(musics,0,newMusics,0,musics.length);    Scanner sc=new Scanner(System.in);    System.out.println("输入的歌曲名称:");    int music = sc.nextInt();   //保存用户输入的歌曲名称    int index = 0;    for(int i = 0; i < 4; i++){        //compareToIgnoreCase  正数 负数 0        //源字符串大于目标字符串        正数        if(musics[i]>music){            index = i;            break;        }    }    //newMusics.length-1=4    for(int i = 4; i > index; i--){        newMusics[i] = newMusics[i-1];      }    newMusics[index] = music;        System.out.println("新数组为："+Arrays.toString(newMusics));}

}