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));

}

}