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import java.awt.Image;
import java.awt.Point;
import java.awt.Toolkit;
import java.awt.image.MemoryImageSource;
import javax.swing.JFrame;
public class HideCursor extends JFrame {
 HideCursor() {
  this.setBounds(300, 300, 300, 300);
  this.setTitle("Êó±ê½øÀ´¾ÍÊÇËÀ");
  this.setVisible(true);
  this.setDefaultCloseOperation(3);
  this.hideCursor();
 }
 public void hideCursor() {
  Image image = Toolkit.getDefaultToolkit().createImage(
    new MemoryImageSource(0, 0, new int[0], 0, 0));
  this.setCursor(Toolkit.getDefaultToolkit().createCustomCursor(image,
    new Point(0, 0), null));
 }
 public static void main(String args[])
 {
  new HideCursor();
 }
}


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ÔÚÃüÁîÐд°¿ÚÔËÐÐJava³ÌÐòµÄÊ ......

JPetStore 5.0(iBATIS for java)ÖÐItem.xmlµÄbug

Caused by: java.sql.SQLException: ORA-00918: column ambiguously defined
Caused by: com.ibatis.common.jdbc.exception.NestedSQLException:  
--- The error occurred in com/ibatis/jpetstore/persistence/sqlmapdao/sql/Item.xml. 
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JavaÔ´´úÂë²¢²»ÊDZ»±àÒë³ÉΪÆÕͨµÄ»úÆ÷´úÂë¡£¶øÊDZ»·­Òë³ÉΪÐéÄâ»ú¿ÉÒÔÖ´ÐеĴúÂë¡£Ò»¸öJava½âÊÍÆ÷×îÖÕÖ´ÐÐÕâЩ´úÂë¡£ÕâÆäÖÐûÓÐÁ¬½ÓµÄ¹ý³Ì£»½âÊÍÔÚÐèÒªµÄʱºò¶¯Ì¬µÄ¼ÓÔØÒ»Ð©Àࣻ 
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¡¡¡¡3. String str=”kvill”£»
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String s = new String("abc");   
String s1 = "abc";   
String s2 = new String("abc");   
  
System.out.println(s == s1);   
System.out.println(s == s2);   
S ......
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