person.java

实例精华

package hl;

//父类
class Person
{
        String name;
        int age;
        String sex;

        public Person()
        {
                System.out.println("构造器Person()被调用");
                sex ="Male";
                System.out.println("name="+name+" ,age="+age+" ,sex="+sex);
        }
        public Person(String theName)
        {
                System.out.println("构造器Person(String theName)被调用");
                name = theName;
                System.out.println("name="+name+" ,age="+age+" ,sex="+sex);
        }
        public Person(String theName,int theAge)
        {
                System.out.println("构造器Person(String theName,int theAge)被调用");
                name = theName;
                age = theAge;
                System.out.println("name="+name+" ,age="+age+" ,sex="+sex);
        }
        //初始化块
        {
                name = "Tony Blair";
                age = 50;
                sex = "Female";
                System.out.println("Person初始化块执行后：name="+name
                        +" ,age="+age+" ,sex="+sex);
        }
}