Program: 47188
Project: 47188
Buggy source:
/** 
 * Create the GUI and show it.
 */
public void showDialog(){
  selectedRenderers=configuration.getSelectedRenderers();
  TreePath[] renderersPath=new TreePath[selectedRenderers.size()];
  TreePath root=new TreePath(allRenderers);
  int i=0;
  for (  String renderer : selectedRenderers) {
    if (configuration.ALL_RENDERERS.equals(renderer)) {
      renderersPath[i]=root;
    }
 else {
      int childNumber=allRenderers.getChildCount();
      for (int j=0; j < childNumber; j++) {
        TreeNode node=allRenderers.getChildAt(j);
        int nodeChildren=node.getChildCount();
        int endIndex=renderer.indexOf("String_Node_Str");
        if (node.toString().equals(renderer)) {
          renderersPath[i]=root.pathByAddingChild(node);
          i++;
          break;
        }
 else {
          if (endIndex > 0 && nodeChildren > 0) {
            if (node.toString().equals(renderer.substring(0,endIndex))) {
              for (int jj=0; jj < nodeChildren; jj++) {
                if (node.getChildAt(jj).toString().equals(renderer.substring(renderer.indexOf("String_Node_Str")))) {
                  renderersPath[i]=root.pathByAddingChild(node).pathByAddingChild(node.getChildAt(jj));
                  i++;
                  break;
                }
              }
              break;
            }
          }
        }
      }
    }
  }
  SrvTree.validate();
  checkTreeManager.getSelectionModel().setSelectionPaths(renderersPath);
  int selectRenderers=JOptionPane.showOptionDialog((Component)PMS.get().getFrame(),this,Messages.getString("String_Node_Str"),JOptionPane.OK_CANCEL_OPTION,JOptionPane.PLAIN_MESSAGE,null,null,null);
  if (selectRenderers == JOptionPane.OK_OPTION) {
    StringBuilder buildSelectedRenders=new StringBuilder();
    TreePath[] selected=checkTreeManager.getSelectionModel().getSelectionPaths();
    for (    TreePath path : selected) {
      String[] treePathString=path.toString().split("String_Node_Str");
      StringBuilder nameStr=new StringBuilder();
      int beginIndex;
      int endIndex;
      if (treePathString.length > 1) {
        if (treePathString[0].contains(allRenderers.toString())) {
          for (i=1; i < treePathString.length; i++) {
            beginIndex=treePathString[i].lastIndexOf("String_Node_Str") + 1;
            endIndex=treePathString[i].indexOf("String_Node_Str");
            if (endIndex > beginIndex) {
              nameStr.append(treePathString[i].substring(beginIndex,endIndex).trim());
            }
 else {
              nameStr.append(treePathString[i].trim()).append("String_Node_Str");
            }
          }
        }
      }
 else {
        if (selected.length == 1) {
          nameStr.append(configuration.ALL_RENDERERS);
        }
      }
      buildSelectedRenders.append(nameStr).append("String_Node_Str");
    }
    configuration.setSelectedRenderers(buildSelectedRenders.toString());
  }
}

Fixed version (ground truth):
/** 
 * Create the GUI and show it.
 */
public void showDialog(){
  selectedRenderers=configuration.getSelectedRenderers();
  TreePath[] renderersPath=new TreePath[selectedRenderers.size()];
  TreePath root=new TreePath(allRenderers);
  int i=0;
  for (  String renderer : selectedRenderers) {
    if (allRenderersTreeName.equals(renderer)) {
      renderersPath[i]=root;
    }
 else {
      int childNumber=allRenderers.getChildCount();
      for (int j=0; j < childNumber; j++) {
        TreeNode node=allRenderers.getChildAt(j);
        int nodeChildren=node.getChildCount();
        int endIndex=renderer.indexOf("String_Node_Str");
        if (node.toString().equals(renderer)) {
          renderersPath[i]=root.pathByAddingChild(node);
          i++;
          break;
        }
 else {
          if (endIndex > 0 && nodeChildren > 0) {
            if (node.toString().equals(renderer.substring(0,endIndex))) {
              for (int jj=0; jj < nodeChildren; jj++) {
                if (node.getChildAt(jj).toString().equals(renderer.substring(renderer.indexOf("String_Node_Str")))) {
                  renderersPath[i]=root.pathByAddingChild(node).pathByAddingChild(node.getChildAt(jj));
                  i++;
                  break;
                }
              }
              break;
            }
          }
        }
      }
    }
  }
  SrvTree.validate();
  checkTreeManager.getSelectionModel().setSelectionPaths(renderersPath);
  int selectRenderers=JOptionPane.showOptionDialog((Component)PMS.get().getFrame(),this,Messages.getString("String_Node_Str"),JOptionPane.OK_CANCEL_OPTION,JOptionPane.PLAIN_MESSAGE,null,null,null);
  if (selectRenderers == JOptionPane.OK_OPTION) {
    StringBuilder buildSelectedRenders=new StringBuilder();
    TreePath[] selected=checkTreeManager.getSelectionModel().getSelectionPaths();
    for (    TreePath path : selected) {
      String[] treePathString=path.toString().split("String_Node_Str");
      StringBuilder nameStr=new StringBuilder();
      int beginIndex;
      int endIndex;
      if (treePathString.length > 1) {
        if (treePathString[0].contains(allRenderers.toString())) {
          for (i=1; i < treePathString.length; i++) {
            beginIndex=treePathString[i].lastIndexOf("String_Node_Str") + 1;
            endIndex=treePathString[i].indexOf("String_Node_Str");
            if (endIndex > beginIndex) {
              nameStr.append(treePathString[i].substring(beginIndex,endIndex).trim());
            }
 else {
              nameStr.append(treePathString[i].trim()).append("String_Node_Str");
            }
          }
        }
      }
 else {
        if (selected.length == 1) {
          nameStr.append(allRenderersTreeName);
        }
      }
      buildSelectedRenders.append(nameStr).append("String_Node_Str");
    }
    configuration.setSelectedRenderers(buildSelectedRenders.toString());
  }
}