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连数据库,输入用户名和密码后如何跳转到主窗口
import javax.swing.*;
import java.awt.event.*;
import java.sql.*;
public class Login extends JFrame implements ActionListener {
private JLabel lbId, lbPass;
private JTextField txtId, txtPass;
private JButton btLogin, btExit;
private Connection datacon = null;//连接对象
private PreparedStatement pstat = null;//命令对象
private ResultSet rs = null;//结果
- 2022-02-05 20:26:14下载
- 积分:1
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层次分析法C语言版
层次分析法C语言版-AHP C language version
- 2022-04-06 21:24:43下载
- 积分:1
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adaptive dimension reduction for clustering high dimensional data
adaptive dimension reduction for clustering high dimensional data
- 2023-05-17 00:20:03下载
- 积分:1
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字母数字简写展开(例:a~d => abcd)
资源描述
输入一个字符串,将字母和数字 简写形式展开(例:a~d => abcd)
例如输入:hello a~d world 1~9 ok
输出:hello abcd world 123456789 ok
- 2022-07-14 14:13:45下载
- 积分:1
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Learnin Mathematics with the ABACUS Activity
Learnin Mathematics with the ABACUS Activity-book
part 7
- 2023-03-07 04:05:04下载
- 积分:1
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stm32 驱动无感直流无刷电机
stm32 pwm 输出控制 无传感器的直流无刷电机,通过stm32 内部AD 检测反电动势来换向,配合上位机使用发送0x01 启动发送0x00 停止发送0x02~0xFF 为调速区间
- 2022-02-04 17:03:40下载
- 积分:1
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CRC32 calculation in C++
CRC32计算算法采用C++语言,可用于嵌入式系统和GUI等应用。
- 2022-03-05 00:31:47下载
- 积分:1
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《科学工程计算C语言算法》一书代码。C语言编写。均写成函数形式,可以直接调用。包括数值微分、数值积分、插值、方程求解等数值算法。...
《科学工程计算C语言算法》一书代码。C语言编写。均写成函数形式,可以直接调用。包括数值微分、数值积分、插值、方程求解等数值算法。-"scientific engineering calculation algorithm C language," a code book. C language. Functions were written form can be called directly. Including numerical differentiation, numerical integration, interpolation, equation solving numerical algorithms.
- 2023-04-20 15:05:03下载
- 积分:1
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这三段C程序能够产生符合高斯、瑞利和泊松分布的随机数,并且包括关于它们的说明文档...
这三段C程序能够产生符合高斯、瑞利和泊松分布的随机数,并且包括关于它们的说明文档-These three paragraphs C program to generate consistent with Gaussian, Rayleigh and Poisson distribution of random numbers, and includes documentation about them
- 2022-01-31 02:36:39下载
- 积分:1
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非线性放大器对发射信号的影响,与调制方式密切相关。不同的调制方式,所得到的时域波形是不同的,如用于欧洲移动通信的GSM制式,该制式采用了高斯滤波的最小偏移键控(...
非线性放大器对发射信号的影响,与调制方式密切相关。不同的调制方式,所得到的时域波形是不同的,如用于欧洲移动通信的GSM制式,该制式采用了高斯滤波的最小偏移键控(GMSK),是一种相位平滑变化的恒定包络的调制方式,因此可以用非线性放大器来放大,不存在包络失真问题,也不会因为频谱再生而干扰邻近信道。
-Non-linear amplifier on the transmit signal of the impact is closely related with the modulation method. Different modulation methods, the resulting time-domain waveforms are different, such as for the European GSM mobile communications standard, the standard use of Gaussian minimum shift keying filter (GMSK), is a smooth change in the phase constant envelope modulation, so you can use non-linear amplifier to amplify, there is no envelope distortion, nor because of spectral regrowth and adjacent-channel interference.
- 2022-01-31 04:18:00下载
- 积分:1