创建一个叫做People的类： 属性：姓名、年龄、性别、身高 行为：说话、计算加法、改名 编写能为所有属性赋值的构造方法； （2）创建主类： 创建一个对象：名叫“张三”，性别“男”，年龄18岁，身高1.80； 让该对象调用成员方法： 说出“你好！” 计算23+45的值 将名字改为“李四”

package com.chuoji;

public class People {

    private String name;

    private int age; 

    private String sex;

    private double height;

    public String getName() {
        return name;
    }

    public void setName(String name) {
        this.name = name;
    }

    public int getAge() {
        return age;
    }

    public void setAge(int age) {
        this.age = age;
    }

    public String getSex() {
        return sex;
    }

    public void setSex(String sex) {
        this.sex = sex;
    }

    public double getHeight() {
        return height;
    }

    public void setHeight(double height) {
        this.height = height;
    }

    public String getsay()
    {
        return "你好";
    }

    public int getAccount(int a, int b)
    {
        return a+b;
    }

}

package com.chuoji;

public class Text04 {

    public static void main(String[] args) {

        People p=new People();
        p.setName("张三");
        p.setAge();
        p.setSex("男");
        p.setHeight(1.80);

        System.out.println("姓名:"+p.getName());

        System.out.println("年龄："+p.getAge());

        System.out.println("性别："+p.getSex());

        System.out.println("身高："+p.getHeight());

        System.out.println("他说："+p.getsay());

        System.out.println("23+45="+p.getAccount(, ));

        p.setName("李四");

        System.out.println("姓名改为："+p.getName());

    }

}