content: package com.alibaba.fastjson2_demo;
  
  import org.junit.jupiter.api.Test;
  
  import java.util.Random;
  
  public class JsonGen {
      private Random r = new Random();
  
      @Test
      public void gen() {
          System.out.println("{");
          final int COUNT = 20;
          for (int i = 0; i < COUNT; ++i) {
  //            System.out.println("private int v" + i + ";");
              String field;
              if (i < 10) {
                  field = "v000" + i;
              } else if (i < 100) {
                  field = "v00" + i;
              } else if (i < 1000) {
                  field = "v0" + i;
              } else {
                  field = "v" + i;
              }
              char[] chars = new char[10];
              for (int j = chars.length - 1; j >= 0; j--) {
                  int r = this.r.nextInt(26);
                  chars[j] = (char) ('a' + r);
              }
              String value = new String(chars);
              System.out.print("\t\"" + field + "\" : \"" + value + "\"");
              if (i != COUNT - 1) {
                  System.out.print(',');
              }
              System.out.println();
          }
          System.out.println("}");
      }
      @Test
      public void gen_int() {
          System.out.println("{");
          final int COUNT = 20;
          for (int i = 0; i < COUNT; ++i) {
  //            System.out.println("private int v" + i + ";");
              String field;
              if (i < 10) {
                  field = "v000" + i;
              } else if (i < 100) {
                  field = "v00" + i;
              } else if (i < 1000) {
                  field = "v0" + i;
              } else {
                  field = "v" + i;
              }
              int intVal = r.nextInt(999999999);
              System.out.print("\t\"" + field + "\" : " + intVal + "");
              if (i != COUNT - 1) {
                  System.out.print(',');
              }
              System.out.println();
          }
          System.out.println("}");
      }
      @Test
      public void gen_bool() {
          System.out.println("{");
          final int COUNT = 20;
          for (int i = 0; i < COUNT; ++i) {
  //            System.out.println("private int v" + i + ";");
              String field;
              if (i < 10) {
                  field = "v000" + i;
              } else if (i < 100) {
                  field = "v00" + i;
              } else if (i < 1000) {
                  field = "v0" + i;
              } else {
                  field = "v" + i;
              }
              boolean val = (r.nextInt() % 2) == 0;
              System.out.print("\t\"" + field + "\" : " + val + "");
              if (i != COUNT - 1) {
                  System.out.print(',');
              }
              System.out.println();
          }
          System.out.println("}");
      }
  
      @Test
      public void gen_long() {
          System.out.println("{");
          final int COUNT = 20;
          for (int i = 0; i < COUNT; ++i) {
  //            System.out.println("private int v" + i + ";");
              String field;
              if (i < 10) {
                  field = "v000" + i;
              } else if (i < 100) {
                  field = "v00" + i;
              } else if (i < 1000) {
                  field = "v0" + i;
              } else {
                  field = "v" + i;
              }
              System.out.print("\t\"" + field + "\" : " + r.nextLong() + "");
              if (i != COUNT - 1) {
                  System.out.print(',');
              }
              System.out.println();
          }
          System.out.println("}");
      }
  }
  