java问题

2025-12-24 11:34:24
推荐回答(1个)
回答1:

if(obj instanceof String){
System.out.println("String "+(String)obj);
}
if(obj instanceof Boolean){
System.out.println("Boolean"+(Boolean)obj.booleanValue());
}
if(obj instanceof Integer){
System.out.println("Integer"+(Integer)obj.intValue());
}
if(obj instanceof Double){
System.out.println("Double"+(Double)obj.doubleValue());
}