Currently class javax.swing.InputVerifier supports the source based validation only. It is worth to add the focus target based validation to support some extended scenarios.


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The javax.swing.InputVerifier class now extended to support the source+target based input focus transferring validation with the release of JDK 9. A new javax.swing.InputVerifier#verifyTarget() method is added, the javax.swing.InputVerifier#shouldYieldFocus() method is overloaded to accept both Swing components participating in focus transfer operation, its old version is now deprecated and does not used by Swing.
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