业务代码中(java class)中如何实现多线程，并且将子线程中的值随方法返回返回值

public static String getAddress(final InputStream inputStream, final String mobile) {
        new Thread() {
            public void run() {
                try {
                    Log.i(TAG, "inputStream: " + inputStream.available());
                    String soap = readSoapFile(inputStream, mobile);
                    byte[] data = soap.getBytes();
 
                    URL url = new URL(
                            "http://webservice.webxml.com.cn/WebServices/MobileCodeWS.asmx");
                    HttpURLConnection conn = (HttpURLConnection) url
                            .openConnection();
                    conn.setDoOutput(true); // 设置允许输出
                    conn.setConnectTimeout(5 * 1000); // 设置超时时间为5秒
                    conn.setRequestMethod("POST");
                    conn.setRequestProperty("Content-Type",
                            "application/soap+xml; charset=utf-8");
                    conn.setRequestProperty("Content-Length",
                            String.valueOf(data.length)); // 设置长度
 
                    OutputStream outputStream = conn.getOutputStream();
                    outputStream.write(data);
                    outputStream.flush();
                    outputStream.close();
 
                    if (conn.getResponseCode() == 200) {
                        address =parseResponseXML(conn
                                .getInputStream()); // 解析服务器端返回的数据 }
                        System.out.println("address=="+address);//这里是有值
                    }
                } catch (Exception e) {
                    Log.e(TAG, e.toString());
                    System.out.println("获取手机号码归属地失败");
                }
            };
        }.start();
        System.out.println("addres"+address);//这里返回的是空
        return address;
    }

public static String getAddress (final InputStream inputStream, final String mobile) {
            Thread thread = new Thread() {
                   public void run() {
                         try {
                              Log. i(TAG, "inputStream: " + inputStream.available());
                              String soap = readSoapFile(inputStream, mobile);
                               byte[] data = soap.getBytes();
 
                              URL url = new URL(
                                           "http://webservice.webxml.com.cn/WebServices/MobileCodeWS.asmx" );
                              HttpURLConnection conn = (HttpURLConnection) url
                                          .openConnection();
                              conn.setDoOutput( true);
                              conn.setConnectTimeout(5 * 1000);
                              conn.setRequestMethod( "POST");
                              conn.setRequestProperty( "Content-Type",
                                           "application/soap+xml; charset=utf-8");
                              conn.setRequestProperty( "Content-Length",
                                          String. valueOf(data.length)); 
 
                              OutputStream outputStream = conn.getOutputStream();
                              outputStream.write(data);
                              outputStream.flush();
                              outputStream.close();
                               
                               if (conn.getResponseCode() == 200) {
                                     address =parseResponseXML(conn
                                                .getInputStream()); 
                              }
                        } catch (Exception e) {
                        }
                  };
            };
            thread.start();
             try { thread.join(); } catch (Exception e) {}
             if(address !=null){
                   return address ;
            }
             return null ;
      }