You might undoubtedly shut your very own JFrame by just tapping on the X get across within upper left part concerning JFrame. Still JFrame.setDefaultCloseOperation int is actually a method provided by JFrame class, you are able to set the duty which will happen whenever client taps may your cross.On their off possibility that 0 looks given as per parameter, JFrame won't near equal after tapping in the cross.package Exampleimport java.awt.GraphicsConfigurationimport javax.swing.JFramepublic class JFrameExample fixed GraphicsConfiguration gcpublic static gap mainString argsJFrame framework new JFrame gcframe.setTitleWelecome to JavaTutorial.netframe.setVisibletrue.