java 几种常用的排序算法

public class XuanZe {
    
    public static void main(String[] args) {
     int a[]={45,89,78,8,46,49};
     int i,j,temp;
        //选择排序
     for(i=0;i<a.length;i++)
     {
     int small=i;
     for(j=i+1;j<a.length;j++)
     {
     if(a[j]<a[small])
     small=j;
     }
     if(small!=i)
     {
     temp=a[i];
     a[i]=a[small];
     a[small]=temp;
     }
    
     }
     for(int x=0;x<a.length;x++)
     System.out.println(a[x]+" ");
    
    
    }
}