enum Color {
红,黄,蓝,绿,黑
}publicclassExample7_7_5{publicstaticvoid main (String args[]){for(Color a : Color.values()){for(Color b : Color.values()){for(Color c : Color.values()){if(a != b){if(a != c && b != c){
System.out.println(a +","+ b +","+ c +"|");}}}}}}}