Quoc Trinh

Sử dụng window look and feel trong swing.     // Get the currently installed look and feel LookAndFeel lf = UIManager.getLookAndFeel(); // Install a different look and feel; specifically, the Windows look and feel try { UIManager.setLookAndFeel( "com.sun.java.swing.plaf.windows.WindowsLookAndFeel" ); } catch (InstantiationException e) { } catch (ClassNotFoundException e) { } catch (UnsupportedLookAndFeelException e) { } catch (IllegalAccessException e) { }

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In software development the Regex is popuplar and the easiest way in validation writing. But It's difficult to remember regex syntax, so this is a some rules to remember it. The best way to remember  regex  syntax is by remembering three things Bracket, caret and Dollars. Bracket: "[" Square brackets: specify the character which needs to be matched. "{" Curly brackets: specify how many character . "(" Round brackets: grouping. Caret: "^" start a regular expression Dollars: "$" end of a regular expression                   Example:   ^[a-z](1,2)$ The above  regex  pattern will only take characters which lies between ‘a’ to ‘z’. The same is marked with square bracket to define the range. The round bracket indicates the minimum and maximum length. Finally caret sign at the start of  regex  pattern and dollar at the end of  regex  pattern specifies the start and end of...

Khi các class được import nhưng không được sử dụng, thì chúng ta sẽ thấy các cảnh báo của eclipse. Chúng ta có thể xóa bỏ chúng một cách dễ dàng với một vài tùy chỉnh trong eclipse.     1. Window-->References         -->Selecte node: Java-->Editor-->Save Actions.     2. Click on button Configure...         Select Unnecessary Code tab --> check Remove unused imports Good luck! (jbohn.blogspot.com)