@Test public void testActionPerformedThrowsNullPointerException() throws Throwable { try { new Debug().actionPerformed(null); fail("Expected NullPointerException to be thrown"); } catch (NullPointerException ex) { if (isJavaVersionAtMost(JAVA_14)) { assertNull(ex.getMessage(), "ex.getMessage()"); } else { assertEquals("Cannot invoke \"java.awt.event.ActionEvent.getActionCommand()\" because \"ev\" is null", ex.getMessage(), "ex.getMessage()"); } } }
public void actionPerformed (ActionEvent ev) { System.out.println ("Action command: "+ev.getActionCommand ()); System.out.println (ev.toString ()); System.out.println (""); }
Debug implements ActionListener { public void actionPerformed (ActionEvent ev) { System.out.println ("Action command: "+ev.getActionCommand ()); System.out.println (ev.toString ()); System.out.println (""); } }
Debug implements ActionListener { public void actionPerformed (ActionEvent ev) { System.out.println ("Action command: "+ev.getActionCommand ()); System.out.println (ev.toString ()); System.out.println (""); } Debug(); }
Debug implements ActionListener { public void actionPerformed (ActionEvent ev) { System.out.println ("Action command: "+ev.getActionCommand ()); System.out.println (ev.toString ()); System.out.println (""); } Debug(); void actionPerformed(ActionEvent ev); }
Debug implements ActionListener { public void actionPerformed (ActionEvent ev) { System.out.println ("Action command: "+ev.getActionCommand ()); System.out.println (ev.toString ()); System.out.println (""); } Debug(); void actionPerformed(ActionEvent ev);  }