Beginning Java AWT and Swing in NetBeans
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SwingUtilities.updateComponentTreeUI(frame);
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UIManager.put("Button.margin", new Insets(2, 5, 2, 5));
UIManager.put("Button.font", new Font("ËÎÌå", Font.PLAIN, 13));
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package graphic;
import javax.swing.ImageIcon;
import javax.swing.JTree;
import java.awt.Component;
import javax.swing.tree.DefaultTreeCellRenderer;
import javax.swing.tree.DefaultMutableTreeNode;
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