Java 初始化类实例？

我正在尝试使用

consoleDroid console=new consoleDroid（）初始化类
consoleDroid
的实例，但它会抛出一个
类、接口或枚举预期的编译错误。初始化类的正确方法是什么

caseSelector.java:

package com.caseselector;

import android.app.Activity;
import android.os.Bundle;

consoleDroid console = new consoleDroid();

public class caseSelector extends Activity
{
    /** Called when the activity is first created. */
    @Override
    public void onCreate(Bundle savedInstanceState)
    {
        super.onCreate(savedInstanceState);
        setContentView(R.layout.main);

        console.create();
    }
}

package com.caseselector;

import android.view.View;
import android.widget.TextView;
import android.widget.EditText;
import android.widget.Button;

public class consoleDroid {

    private static String output;
    private Button consoleButton;
    private TextView consoleView;
    private EditText consoleInput;

    public static void create() {
    }

    public static void write(String input) {
    }

    public static void writeLine(String input) {
    }

    public static String readLine(boolean print) {
        return output;
    }
}

consoleDroid.java:

package com.caseselector;

import android.app.Activity;
import android.os.Bundle;

consoleDroid console = new consoleDroid();

public class caseSelector extends Activity
{
    /** Called when the activity is first created. */
    @Override
    public void onCreate(Bundle savedInstanceState)
    {
        super.onCreate(savedInstanceState);
        setContentView(R.layout.main);

        console.create();
    }
}

package com.caseselector;

import android.view.View;
import android.widget.TextView;
import android.widget.EditText;
import android.widget.Button;

public class consoleDroid {

    private static String output;
    private Button consoleButton;
    private TextView consoleView;
    private EditText consoleInput;

    public static void create() {
    }

    public static void write(String input) {
    }

    public static void writeLine(String input) {
    }

    public static String readLine(boolean print) {
        return output;
    }
}

您必须在类内进行实例化。如果Java类以大写字母开头，看起来会更好

public class caseSelector extends Activity
{
    consoleDroid console = new consoleDroid();

    /** Called when the activity is first created. */
    ....
}

只需将实例化向下移动到类主体中：

public class caseSelector extends Activity
{
    consoleDroid console = new consoleDroid();
    // ...
}

顺便说一句：按约定类名称应以大写字母开头。
首先，按约定类应以大写字母开头。您的问题的答案是-
consoleDroid console=new consoleDroid（）不在适当的位置。它必须位于类中的某个位置—方法或构造函数。
您的代码不在类中。
放

在类内部…
这可能已经提到过，但在Java中，类名应该始终以大写字母开头。