Java wrapper – constructor

A method that hides the attributes and implementation details of an object and provides only public access

Key: Priavte: Is an access modifier that modifies member variables and methods, and modifies members that can only be accessed within the class.

Personal summary: In the future, when we encapsulate a class (entity class), we will first define its properties (private to modify), and then define its GET /set methods.

packageJava package _01;/* * Define a student class * attributes: name, age, gender * method: show () --> Print this student's attributes * */
public class Student {
	private String name;
	private int age;
	private String sex;
	
	// Provide a method to set the name
	public void setName(String name1) {
		name =name1;
	}
	// Provide a method to get the name
	public String getName(a) {
		return name;
	}
	public int getAge(a) {
		return age;
	}
	public void setAge(int age1) {
		age=age1;
	}
	public String getSex(a) {
		return sex;
	}
	void setSex(String sex1) {
		sex=sex1;
	}
	public void Show(a) {
		System.out.println("Name:"+name+", age:+age+", gender:+sex); }}Copy the code

packageJava package _01;public class StudentDemo {

	public static void main(String[] args) {
		// TODO Auto-generated method stub
		Student student = new Student();
		student.setName("Zhang Guowei");
		student.setAge(23);
		student.setSex("Male");
		
		String name =student.getName();
		System.out.println(name);// Output: Zhang Guowei
		student.Show();// Output: Name: Zhang Guowei, age: 23, gender: male}}Copy the code