pittpakk的博客

import java.sql.Connection;  import java.sql.DriverManager;  import java.sql.PreparedStatement;  import java.sql.ResultSet;  import java.util.Scanner;public class Tzengjia { String userName;       S...

import java.sql.Connection;import java.sql.DriverManager;import java.sql.ResultSet;import java.sql.SQLException;import java.sql.Statement;import java.util.Scanner;public class test { // TODO Auto-gen...

卸载 查看已经安装的jdk [root@bogon jre]# rpm -qa|grep jdk java-1.8.0-openjdk-headless-1.8.0.65-3.b17.el7.x86_64 java-1.7.0-openjdk-1.7.0.91-2.6.2.3.el7.x86_64 java-1.7.0-openjdk-headless-1.7.0.91-2.6.2.3.el7...