content: package com.alibaba.fastjson2.fieldbased;
  
  import com.alibaba.fastjson2.JSON;
  import com.alibaba.fastjson2.JSONWriter;
  import org.junit.jupiter.api.Test;
  
  import java.util.Collection;
  import java.util.Collections;
  import java.util.List;
  import java.util.Map;
  
  import static org.junit.jupiter.api.Assertions.assertEquals;
  
  public class FieldBasedTest2 {
      @Test
      public void test_0() {
          A a = new A();
          a.v3 = 'A';
          a.v7 = new int[]{101};
          a.v8 = Collections.emptyList();
          a.v9 = Collections.emptyMap();
          a.v10 = Collections.emptyList();
  
          String str = JSON.toJSONString(a, JSONWriter.Feature.FieldBased);
          assertEquals("{\"v0\":0,\"v1\":0.0,\"v10\":[],\"v2\":0.0,\"v3\":\"A\",\"v4\":0,\"v5\":0,\"v6\":false,\"v7\":[101],\"v8\":[],\"v9\":{}}", str);
      }
  
      static class A {
          long v0;
          float v1;
          double v2;
          char v3;
          byte v4;
          short v5;
          boolean v6;
          int[] v7;
          List v8;
          Map v9;
          Collection v10;
      }
  }
  