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java.lang.NoClassDefFoundError: 	at java.lang.Class.forName0(Native Method)	at java.lang.Class.forName(Class.java:168)	at java.awt.Toolkit$2.run(Toolkit.java:822)	at java.security.AccessController.doPrivileged(Native Method)	at java.awt.Toolkit.getDefaultToolkit(Toolkit.java:805)	at com.jgoodies.looks.LookUtils.isLowResolution(Unknown Source)	at com.jgoodies.looks.LookUtils.(Unknown Source)	at com.jgoodies.looks.plastic.PlasticLookAndFeel.(PlasticLookAndFeel.java:122)	at java.lang.Class.forName0(Native Method)	at java.lang.Class.forName(Class.java:246)	at javax.swing.SwingUtilities.loadSystemClass(SwingUtilities.java:1783)	at javax.swing.UIManager.setLookAndFeel(UIManager.java:483)	at oracle.install.commons.util.Application.startup(Application.java:758)	at oracle.install.commons.flow.FlowApplication.startup(FlowApplication.java:164)	at oracle.install.commons.flow.FlowApplication.startup(FlowApplication.java:181)	at oracle.install.commons.base.driver.common.Installer.startup(Installer.java:265)	at oracle.install.ivw.db.driver.DBInstaller.startup(DBInstaller.java:114)	at oracle.install.ivw.db.driver.DBInstaller.main(DBInstaller.java:132)