Java Can'；t连接到SOCKS代理：连接被拒绝：连接

我得到以下错误。检查许多解决方案，但没有得到结果

Not Connected to the database - networkcoding com.mysql.jdbc.exceptions.jdbc4.CommunicationsException: Communications link failure ERROR: java.lang.NullPointerException The last packet sent successfully to the server was 0 milliseconds ago. The driver has not received any packets from the server. 错误在代码的以下部分中：

package privacysensor;

import java.io.File;
import java.sql.Connection;
import java.sql.PreparedStatement;
import java.sql.ResultSet;
import java.sql.Statement;
import java.text.DateFormat;
import java.text.SimpleDateFormat;
import java.util.Calendar;
import java.util.Date;
import java.util.Random;
import javax.swing.JOptionPane;

public class Sensors extends javax.swing.JFrame {

    /**
     * Creates new form Sensors
     */
    String s1 = "", s2 = "", s3 = "", s4 = "", s5 = "", s6 = "", s7 = "", s8 = "", s9 = "";
    DBConnect c = new DBConnect();
    DateFormat df = new SimpleDateFormat("hh:mm a");
    Calendar cal1 = Calendar.getInstance();
    org.jdesktop.application.ResourceMap resourceMap =
        org.jdesktop.application.Application.getInstance(
            privacysensor.PrivacySensorApp.class).getContext().getResourceMap(Sensors.class);
    Class1 x = new Class1();
    int id, id1;

    public Sensors() {
        initComponents();
        try {
            id = x.idgeneration();
            id1 = x.Tidgeneration();
            Connection c1 = c.getConnection();
            Connection c2 = c.getConnection();
            PreparedStatement pst = c1.prepareStatement("update sensors set status='Offline' where id=" + id);
            int s = pst.executeUpdate();
            if (s == 0) {
                System.out.println("Not updated");
            } else {
                System.out.println("Updated");
            }
            PreparedStatement pst1 = c2.prepareStatement("update timing set status='Offline' where id=" + id1);

            s = pst1.executeUpdate();
            if (s == 0) {
                System.out.println("Timer updated");
            } else {
                System.out.println("TImer not updated");
            }
        } catch (Exception e) {
            System.out.println(e);
        }
        ...    // End of variables declaration                   
    }
}

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欢迎提出任何建议。谢谢，

我使用mac OS X，但我发现了一个错误：

无法连接到SOCKS代理：连接被拒绝：连接

我打开：
系统首选项->网络->高级->代理->代理

---

这就解决了问题。

在堆栈跟踪中，我发现错误无法连接到SOCKS代理：连接被拒绝：连接 我想是因为系统代理设置，连接被拒绝了。移除代理，它将像符咒一样工作。要删除Windows 10中的代理设置， 打开设置-单击网络和互联网-单击代理 在手动代理设置中，取消选中使用代理服务器

---

谢谢大家。

您能提供完整的堆栈跟踪吗？是哪一个？连接被拒绝？还是空指针异常？袜子在哪里变得更时髦？问题是什么？谢谢大家，我会尽力解决的。我删除了代理设置。从stacktrace了解到无法连接到SOCKS代理：连接被拒绝：连接关于SOCKS代理，除了您奇怪的标题之外，您没有任何问题。不清楚你在问什么。在你的问题中，堆栈跟踪中没有这样的错误。

package privacysensor;

import java.io.File;
import java.sql.Connection;
import java.sql.PreparedStatement;
import java.sql.ResultSet;
import java.sql.Statement;
import java.text.DateFormat;
import java.text.SimpleDateFormat;
import java.util.Calendar;
import java.util.Date;
import java.util.Random;
import javax.swing.JOptionPane;

public class Sensors extends javax.swing.JFrame {

    /**
     * Creates new form Sensors
     */
    String s1 = "", s2 = "", s3 = "", s4 = "", s5 = "", s6 = "", s7 = "", s8 = "", s9 = "";
    DBConnect c = new DBConnect();
    DateFormat df = new SimpleDateFormat("hh:mm a");
    Calendar cal1 = Calendar.getInstance();
    org.jdesktop.application.ResourceMap resourceMap =
        org.jdesktop.application.Application.getInstance(
            privacysensor.PrivacySensorApp.class).getContext().getResourceMap(Sensors.class);
    Class1 x = new Class1();
    int id, id1;

    public Sensors() {
        initComponents();
        try {
            id = x.idgeneration();
            id1 = x.Tidgeneration();
            Connection c1 = c.getConnection();
            Connection c2 = c.getConnection();
            PreparedStatement pst = c1.prepareStatement("update sensors set status='Offline' where id=" + id);
            int s = pst.executeUpdate();
            if (s == 0) {
                System.out.println("Not updated");
            } else {
                System.out.println("Updated");
            }
            PreparedStatement pst1 = c2.prepareStatement("update timing set status='Offline' where id=" + id1);

            s = pst1.executeUpdate();
            if (s == 0) {
                System.out.println("Timer updated");
            } else {
                System.out.println("TImer not updated");
            }
        } catch (Exception e) {
            System.out.println(e);
        }
        ...    // End of variables declaration                   
    }
}