在windows电脑连接安卓设备的环境下：使用java写一段代码：1.发送adb命令“reboot”等待adb设备重启成功；2.循环获取并输出getRestoreStatus()方法的值，30秒后退出循环

以下是您需要的java代码：

import java.io.BufferedReader;
import java.io.IOException;
import java.io.InputStreamReader;

public class ADBController {
    public static void main(String[] args) throws IOException {
        Runtime runtime = Runtime.getRuntime();
        Process process = null;

        //Send reboot command
        process = runtime.exec("adb reboot");
        System.out.println("ADB command sent: adb reboot");

        //Wait for device to restart
        try{
            Thread.sleep(10000); //Wait for 10 seconds
        }catch(InterruptedException e){
            System.out.println("InterruptedException caught");
        }

        //Loop until getRestoreStatus() returns non-empty string
        String restoreStatus = "";
        long startTime = System.currentTimeMillis();
        while(restoreStatus.isEmpty()){
            try{
                process = runtime.exec("adb shell bmgr getPendingRestores");
                BufferedReader reader = new BufferedReader(new InputStreamReader(process.getInputStream()));
                restoreStatus = reader.readLine();
                System.out.println("Restore status: " + restoreStatus);
                reader.close();
            }catch(IOException e){
                System.out.println("IOException caught");
                e.printStackTrace();
            }

            //Exit loop after 30 seconds
            if((System.currentTimeMillis() - startTime) > 30000){
                System.out.println("Exiting loop after 30 seconds");
                break;
            }

            //Wait for 5 seconds before checking restore status again
            try{
                Thread.sleep(5000); //Wait for 5 seconds
            }catch(InterruptedException e){
                System.out.println("InterruptedException caught");
            }
        }
    }
}

注意：在使用此代码之前，请确认您已经安装并配置好了ADB驱动程序以及在Path环境变量中添加了ADB的路径。