仅参数类型不同的重载方法，使用过程的一个困惑：
有没有必要使用instanceof方法？
package overload.special;
public class OverLoadTest {
public void test(Object obj){
System.out.println("Object:"+obj);
}
public void test(Integer integer){
System.out.println("Integer:"+integer);
}
public void test(int int1){
System.out.println("int:"+int1);
}
public void test(String str){
System.out.println("String:"+str);
}
public static void main(String[] args) {
OverLoadTest ot=new OverLoadTest();
ot.test(1);
Integer object_int=new Integer(1);
ot.test(object_int);
Object obj=object_int;
ot.test(obj);
ot.test("1");
}
}
优先级：
基本类型>对象
对象中 子类>父类，
其中Object类的优先级最低
http://shmilyaw-hotmail-com.iteye.com/blog/1447631
package overload.special;
public class OverLoadTest {
public void test(Object obj){
System.out.println("Object:"+obj);
}
public void test(Integer integer){
System.out.println("Integer:"+integer);
}
public void test(int int1){
System.out.println("int:"+int1);
}
public void test(String str){
System.out.println("String:"+str);
}
public static void main(String[] args) {
OverLoadTest ot=new OverLoadTest();
ot.test(1);
Integer object_int=new Integer(1);
ot.test(object_int);
Object obj=object_int;
if (obj instanceof Integer) {
ot.test(object_int);
}else {
ot.test(obj);
}
ot.test("1");
}
}