字符串声明VariableDeclaratorId预计此令牌后 [英] String declaration VariableDeclaratorId expected after this token

问题描述

我在这个简单的code问题，我宣布一个String，想改变它里面的onCreate但此后的onCreate我有错误此令牌后VariableDeclaratorId预期！
如果我把项目= 222里面的onCreate我得到111null333时，显示吐司
这里是我的code

i have problem in this simple code, I declare a String , and want change it inside onCreate but AFTER onCreate i have "VariableDeclaratorId expected after this token" Error !! And if i put item=222 inside onCreate i get "111null333" when Toast display here is my code

public class MainActivity extends Activity {


 static String item;
@Override
public void onCreate(Bundle savedInstanceState) {
    super.onCreate(savedInstanceState);
    setContentView(R.layout.activity_main);


    Toast.makeText(getApplicationContext(), mStrings[0], Toast.LENGTH_SHORT).show();

}

 item="222"; 
private String[] mStrings={

        "111"+item+"333",
        "test"
};

}

推荐答案

能否请你花一些时间，正确格式化你的问题？我没有看清楚，如果该项目=222;是一种方法里面还是不行。

Can you please spend some time and format your question correctly ? i do not see clearly if the item = "222"; is inside a method or not.

但是如果你的格式是正确，那么你的问题是，一个值项变量的分配不能在方法或code的静态{}块外完成。所以，如果你分配一个值之前，使用该项目的变量另一个对象或类变量这将是默认值（NULL对象和0或假的原始值）。

But if your formatting is "correct" then your problem is that the assignation of a value to the item variable can not be done outside of a method or the static{} block of code. And so if you use the item variable in another object or class variable before assigning it a value it will be the default value (null for objects and 0 or false for the primitive values).

希望这有助于。

更新：

public class MainActivity extends Activity {

    static String item;
    private String[] mStrings;

    @Override
    public void onCreate(Bundle savedInstanceState) {
        super.onCreate(savedInstanceState);
        setContentView(R.layout.activity_main);
        item = "222";
        mStrings = new String[2];
        mStrings[0] = "111" + item + "333";
        mStrings[1] = "test";
        Toast.makeText(getApplicationContext(), mStrings[0], Toast.LENGTH_SHORT).show();
    }

}

这篇关于字符串声明VariableDeclaratorId预计此令牌后的文章就介绍到这了，希望我们推荐的答案对大家有所帮助，也希望大家多多支持IT屋！