vava_buy_official/ZtestDemo/Example.java

import java.io.*;

public class Example {
  public static void main(String[] args) throws IOException {
    try (PrintStream ps = 
          new PrintStream(new FileOutputStream("./data.txt"), true);
    ) {
      ps.println(new Student("张三", 26));
      ps.println(new Student("李四", 25));
      ps.println(new Student("王五", 27));
      System.out.println("Success!");
    }
    catch(IOException e) {
      e.printStackTrace();
    }
  }
}


class Student {
  private String name;
  private int age;

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

  public String getName() {
    return this.name;
  }

  public int getAge() {
    return this.age;
  }


  @Override
  public String toString() {
    String str = "Student{name=" + this.name + "; age=" + this.age + "}";
    return str;
  }
}