ToStringExample.java

package com.examplehub.basics;

public class ToStringExample {
  public static void main(String[] args) {
    Student stuJack = new Student(1001, "Jack", 23, 'M');
    System.out.println(stuJack.toString()); /* Student{id=1001, name='Jack', age=23, sex=M} */

    Student stuTim = new Student(1002, "Tim", 20, 'W');
    System.out.println(stuTim.toString()); /* Student{id=1002, name='Tim', age=20, sex=W} */
  }
}

class Student {
  private int id;
  private String name;
  private int age;
  private char sex;

  public Student(int id, String name, int age, char sex) {
    this.id = id;
    this.name = name;
    this.age = age;
    this.sex = sex;
  }

  public int getId() {
    return id;
  }

  public void setId(int id) {
    this.id = id;
  }

  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 char getSex() {
    return sex;
  }

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

  @Override
  public String toString() {
    return "Student{"
        + "id="
        + id
        + ", name='"
        + name
        + '\''
        + ", age="
        + age
        + ", sex="
        + sex
        + '}';
  }
}