example_2（类和方法）

实例一：

public class people {
    public static void main(String[] args) {
        person p1 = new person();//实例化一个人，p1
        p1.name = "张三";
        p1.age = 24;
        p1.hight = 170;
        p1.peo();//调用方法

        System.out.println("");

        person p2 = new person();
        p2.name = "张1";
        p2.age = 24;
        p2.hight = 170;
        p2.peo();//调用方法
    }
}

class person {
    String name;
    int age;
    int hight;

    static {
        System.out.println("静态");//整个文件中先加载此处静态,且只加载1次
    }

    public void peo() {
        System.out.print(name + ":" + age + ":" + hight);
    }
}

 

实例二：

public class FZperson {
    public static void main(String[] args) {
        pe p1 = new pe();
        p1.setAge(18);
        System.out.println(p1.getAge());

    }
}

class pe {
    private String name;
    private int age;
    private boolean flag;
    public String getName() {
        return name;
    }
    public void setName(String name) {
        this.name = name;
    }
    public void setAge(int age) {
        this.age = age;
    }
    public int getAge() {
        return age;
    }
    public boolean isFlag() {
        return flag;
    }
    public void setFlag(boolean flag) {
        this.flag = flag;
    }
}