title: GSON : java.lang.IllegalStateException: Expected BEGIN_OBJECT but was STRING
body: <p>I am facing a problem about the GSON json to Java. I looked up many posts here, but I cannot find the solution for my question. So I list my problem here. Thanks very much !</p>
  
  <p>Here is my Json Data</p>
  
  <pre><code>"{
      "data": {
          "marks": "",
          "spines": "",
          "dendrites": {
              "voxel": [
                  [383,382,382,381],
                  [49,50,51,52],
                  [7,10,10,10],
                  [0,0,0,0]
              ],
              "maxint": [32,42,28,28],
              "maxintcorrected": null,
              "maxintcube": null,
              "medianfiltered": [54.36979745,54.36979745,54.36979745,54.36979745],
              "meanbacksingle": null,
              "maxintsingle": null,
              "thres": null,
              "meanback": 42,
              "index": 1,
              "length": [0,0.3223757885,0.6336712814,0.9350672197,1.227262867],
              "XYlength": [0,0.2085982964,0.410997367,0.6084466603]
          }
      }
  }
  "
  </code></pre>
  
  <p>My Class's defination is following</p>
  
  <pre><code>public class Test {
      public data data;
  
      public class data {
  
          public Object marks;
          public String spines = "";
          public StandardSpinenalysisImage.data.dendrites[] dendrites;
  
          public class dendrites {
  
              public int voxel[][];
              public int maxint[];
              public String maxintcorrected = "";
              public String maxintcube = "";
              public int medianfiltered[];
              public String meanbacksingle = "";
              public String maxintsingle = "";
              public int thres = 0;
              public int meanback;
              public int index = 0;
              public int length[];
              public int XYlength[];
  
              public dendrites() {
                  this.thres = 100;
              }
          }
      }
  }
  </code></pre>
  
  <p>But when I use the code 
      Test t = g.fromJson(input, Test.class);</p>
  
  <p>I got the error result. </p>
  
  <pre><code>Exception in thread "AWT-EventQueue-0" com.google.gson.JsonSyntaxException: java.lang.IllegalStateException: Expected BEGIN_OBJECT but was STRING at line 1 column 5
  </code></pre>
  
  <p>Thank you very very MUCH!!</p>