Compilation Error "Illegal Start of Type" -

i getting compilation error each time try compile code snippet. error "illegal start of type" , occurs @ "for(int i=0;i

class hello {      int a[]={3,4,2,7,4,9,1,4,6,3};     int n=a.length;     for(int i=0;i<n;i++)     {         for(int j=i;j<n-i-1;j++)         { //ascending order           if(a[j-1]>a[j])             {                 int temp=a[j];                 a[j]=a[j-1];                 a[j-1]=temp;             }         }     }     for(int i=0;i<n;i++)     system.out.println(a[i]); } 

i realized error. forgot make main method.