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import java.io.*;
class FileTest
{
public static void main(String [] args) throws Exception
{
File fDir=new File(File.separator);
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var x,y,z,t;
if (x>y)
{t=x;x=y;y=t;} //½»»»x,yµÄÖµ
if(x>z)
{t=z;z=x;x=t;}//½»»»x,zµÄÖµ
if(y>z)
{t=y;y=z;z=t;}//½»»»z,yµÄÖµ
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private static final String URL = "jdbc:oracle:thin:@localhost:1521:orcl";
private static final String USERNAME = "sys";
private static final String PASSWORD = "s ......