double bim = 29.85;
String tips = "";
if(bim < 18.5) {
	tips = "BIM过轻";
}else if(bim < 25 && bim >= 18.5) {
	tips = "BIM正常";
}else if(bim < 28 && bim >= 25) {
    tips = "BIM过重";
}else if(bim < 32 && bim >= 28) {
	tips = "BIM肥胖";
}else {
	tips = "BIM非常肥胖";
}
System.out.print(tips);