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java.awt.IllegalComponentStateException: The dialog is displayable. at java.awt.Dialog.setUndecorated(Dialog.java:696) at untitled2.Frame1.jButton1_actionPerformed(Frame1.java:59) at untitled2.Frame1$1.actionPerformed(Frame1.java:38) at javax.swing.AbstractButton.fireActionPerformed(AbstractButton.java:1786)