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Figure 1-34 Select Working Sets dialog
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Click the New button to create a new working set This opens the New Working Set dialog (see Figure 1-35) Three different types of working sets may be created including resource working sets, Java working sets and help working sets Select the type of working set that you want to create and click the Next button
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Figure 1-35 New Working Set dialog
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The next page of the New Working Set dialog facilitates defining the new working sets (see Figure 1-36) Enter the desired name into the Work-
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ing set name field, and select the contents from the Working set content list Clicking the Finish button closes the New Working Set dialog, and adds the new working set to the Select Working Sets dialog
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Figure 1-36 Define the new working set
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17 WRITING CODE
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Now that we have created our first Java project and explored different ways to navigate the system and find items that we need, it is time to start using the Eclipse tools to write new code Eclipse supports a number of different editor types, both internal and external, for exiting different types of resources Double-clicking on a Java file, for example, opens the Java file editor (see Figure 1-37)
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Figure 1-37 Java editor
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171 Java Editor The Java editor provides many features focused on the job of editing Java code such as: Color syntax-highlighting (see Figure 1-37) User-defined code formatting Import organization and correction Context-sensitive code assistance Quick Fix automatic problem correction
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Tip: Many former VisualAge for Java users loved the ability of that IDE to show only a single method at a time rather than the entire Java file The Eclipse Java editor supports the same capability via the Show Source of Selected
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Element Only tool bar button For this button to work, you must give focus to an editor since the button is not enabled until you're actually editing some code This is one of those options in Eclipse that should really be a workspace preference rather than a button on the tool bar
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Color syntax highlighting
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vided for multi- and single-line comments, keywords, strings and characters, task tags and Javadoc elements via the Java > Editor > Syntax preference page (see Figure 1-38)
Figure 1-38 Syntax preference page
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User-defined code formatting
The code formatting feature controls how Java code will be formatted any time the Source > Format command is issued A variety of options are provided for controlling brace position, new lines, line length and white space usage via the Java > Code Formatter preference page (see Figure 139)
Tip: Alternate code formatters can be found in Appendix A, including JIndent integration into Eclipse (http://wwwjavadudecom/tools)
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Figure 1-39 Code Formatter preference page
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The import organization feature provides an easy way to clean up the import statements within a Java file New imports may be added using the Source > Add Import command and existing imports cleaned up using the Source > Organize Imports command The Java > Organize Imports preference page (see Figure 1-40) provides a means to set the default order of import statements and the threshold above which wildcard imports are used
Tip: Set the threshold to 1 to cause packages to be imported with "*" immediately or keep the default value, 99, to always import each type individually depending upon your coding style
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Figure 1-40 Organize Imports preference page
Context-sensitive code assist
The context-sensitive code assist feature can help speed up the creation of Java code quite dramatically It can complete class names, method names, parameter names and more To use it, position the cursor at a location in
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your Java code needing a suggestion and either select the Edit > Content Assist command or hold the Ctrl key down while pressing the Space key This opens the popup code assist window (see Figure 1-41)