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PODiscontinuity between java.util.regex.Matcher.group and string comparison
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  1. PODiscontinuity between java.util.regex.Matcher.group and string comparison
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    copied!<p>All I want to do is load information I saved to a plain text file about the position of a <a href="http://docs.oracle.com/javase/7/docs/api/javax/swing/JInternalFrame.html" rel="nofollow">JInternalFrame</a> and set the frame to the state it was saved as. For some reason I'm unable to compare capture groups with strings; that is, <code>matcher.group("state")</code> compared to the string it should be (<code>"min"</code>, <code>"max"</code>, or <code>"normal"</code>) is not returning true, and the same goes with <code>matcher.group("vis")</code>.</p> <pre><code>String fileArrayStr = "WINDOW_LAYOUT:0,0|779x768|max|show" </code></pre> <p>My code is:</p> <pre><code>byte[] fileArray = null; String fileArrayStr = null; try { fileArray = Files.readAllBytes(PathToConfig); } catch (IOException e) { e.printStackTrace(); } try { fileArrayStr = new String(fileArray, "UTF-8"); } catch (UnsupportedEncodingException e) { e.printStackTrace(); } // checking the value of fileArrayStr here by outputting it // confirms the data is read correctly from the file pattern = Pattern.compile( "WINDOW_LAYOUT:\\s*" + "(?&lt;x&gt;[0-9\\-]+),(?&lt;y&gt;[0-9\\-]+)\\|" + "(?&lt;length&gt;\\d+)x(?&lt;height&gt;\\d+)\\|" + "(?&lt;state&gt;[minaxorl]+)\\|" + "(?&lt;vis&gt;[showide]+)\\s*"); matcher = pattern.matcher(fileArrayStr); if (matcher.find()) { frame.setLocation(Integer.parseInt(matcher.group("x")), Integer.parseInt(matcher.group("y"))); frame.setSize(Integer.parseInt(matcher.group("length")), Integer.parseInt(matcher.group("height"))); DialogMsg("state: " + matcher.group("state") + "\n" + "vis: " + matcher.group("vis")); // the above DialogMsg call (my own function to show a popup dialog) // shows the // data is being read correctly, as the values are "max" and "show" // for state // and vis, respectively. Same with the DialogMsg calls below. if (matcher.group("state") == "min") { try { frame.setIcon(true); } catch (PropertyVetoException e) { e.printStackTrace(); } } else if (matcher.group("state") == "max") { try { frame.setMaximum(true); } catch (PropertyVetoException e) { e.printStackTrace(); } } else { DialogMsg("matcher.group(\"state\") = \"" + matcher.group("state") + "\""); } if (matcher.group("vis") == "show") { frame.setVisible(true); } else if (matcher.group("vis") == "hide") { frame.setVisible(false); } else { DialogMsg("matcher.group(\"vis\") = \"" + matcher.group("vis") + "\""); } } </code></pre> <p>The code is always falling back to the <code>else</code> statements. What am I doing wrong? <a href="http://docs.oracle.com/javase/7/docs/api/java/util/regex/Matcher.html#group%28java.lang.String%29" rel="nofollow">matcher.group</a> is supposed to return a string, is it not?</p>
 

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