我們知道,我們通過調用線程的start方法啟動一個線程,那麼,我們可以直接調用run方法來啟動一個線程嗎? 先看下面一段代碼:public class Test {public static void main(String[] args) {// TODO Auto-generated method stubTestThread tt = new TestThread();tt.run();}}class TestThread extends Thread {static int i =
備份一個小程式。利用MD5加密檔案,產生一個密文的來源程式。非常好用。import java.security.MessageDigest;import java.security.NoSuchAlgorithmException;import java.io.*;public class EncryptUtil{ /** * * @param filePath The full path of the file * @return * @throws Exception
一、Table or Result To ArrayList 將資料來源connA中的tableName表的內容查詢出來放到一個ArrayList中。 private static ArrayList TableToArrayList(String tableName, Connection connA) { Statement stmt = null; ArrayList list = new ArrayList();
1. java.util.Date與java.sql.Datejava.util.Date與java.sql.Date不能直接轉換。他們擷取目前時間的方法分別是:java.util.Date date = new java.util.Date();java. sql.Date date = new java. sql.Date(System.currentTimeMillis()); 2.
Manual Installation and Registration of Java Plugin for Linux JDK DocumentationWhen you install the Java platform, the Java plugin file is included as part of that install. If you want to use Java within Firefox, you need to manually create a
1.String a = "abc" 和String a = new String("abc")不同測試代碼如下:String a = "abc";String b = "abc";System.out.println(a == b);輸出:true==========================String a = new String("ade");String b = new String("ade");System.out.println(a ==