java - 如何访问try-catch中的变量？

我正在做类似的事情

JSONArray json = uf.getAllRows();
(int x = 0; x <= json.length(); x++) {
JSONObject jo = json.getJSONObject(x); //Eclipse is suggesting that use try-catch here.

String name = jo.getString("username");
mainll[x] = new LinearLayout(this);
mainll[x].setId(x);
mainll[x].setLayoutParams(new LayoutParams(LayoutParams.FILL_PARENT,   LayoutParams.WRAP_CONTENT));
mainll[x].setGravity(Gravity.CENTER);
.
.
.
.
}

如果我使用try catch而不是“ jo”，则在以下行无法识别：

String name = jo.getString("username");

谁能告诉我如何解决这个问题？

最佳答案

包好一切

try{
  JSONArray json = uf.getAllRows();
  (int x = 0; x <= json.length(); x++) {
  JSONObject jo = json.getJSONObject(x); //Eclipse is suggesting that use try-catch here.

  String name = jo.getString("username");
  mainll[x] = new LinearLayout(this);
  mainll[x].setId(x);
  mainll[x].setLayoutParams(new LayoutParams(LayoutParams.FILL_PARENT, LayoutParams.WRAP_CONTENT));
  mainll[x].setGravity(Gravity.CENTER);
}
catch(Exception e){}