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请帮帮我!

我已经创建了一个EmployeeTest写入Employee类的类,但是在我完成它之前会发生这个错误.我在这个项目之前编写了类似的项目,它运行没有错误.这是一个非常简单的类,如下所示.

这是错误消息:

initialization ERROR : No runnable methods
    -No runnable methods
    -java.lang.Exception
    -at java.lang.reflect.Constructor.newInstance(Constructor.java:526)

这是EmployeeTest班级:

import org.junit.AfterClass;
import org.junit.Before;
import org.junit.BeforeClass;
import org.junit.Test;
import static org.junit.Assert.*;

public class EmployeeTest {
Employee employee;
public EmployeeTest() {
}

@BeforeClass
public static void setUpClass() {
}

@AfterClass
public static void tearDownClass() {
}

@Before
public void setUp() {
    employee = new Employee("Austin", "Powers", 70000.00); 
}
public void testGetName(){
    String expected = "Austin Powers";
    String actual = …

此应用程序尝试连接到mysql并插入/更新/删除数据到数据库但是当启动应用程序时它显示消息"不幸的是项目已停止"

MainActivity.java

package com.example.testsql;
import java.io.BufferedReader;
import java.io.InputStream;
import java.io.InputStreamReader;
import java.util.ArrayList;
import org.apache.http.HttpEntity;
import org.apache.http.HttpResponse;
import org.apache.http.NameValuePair;
import org.apache.http.client.HttpClient;
import org.apache.http.client.entity.UrlEncodedFormEntity;
import org.apache.http.client.methods.HttpPost;
import org.apache.http.impl.client.DefaultHttpClient;
import org.apache.http.message.BasicNameValuePair;
import org.json.JSONArray;
import org.json.JSONException;
import org.json.JSONObject;
import android.app.Activity;
import android.os.Bundle;
import android.util.Log;
import android.view.View;
import android.view.View.OnClickListener;
import android.widget.Button;
import android.widget.EditText;
import android.widget.TextView;
import android.widget.Toast;

public class MainActivity extends Activity implements OnClickListener {

 Button btn_select;
 Button btn_insert;
 Button btn_update;
 Button btn_delete;

 TextView tv_res;
 EditText txt_hn;
 EditText txt_name;
 EditText txt_age;

 @Override
 public void onCreate(Bundle …