{"id":1236,"date":"2014-09-30T09:52:09","date_gmt":"2014-09-30T07:52:09","guid":{"rendered":"http:\/\/liceocuneo.it\/oddenino\/?p=1236"},"modified":"2014-09-30T09:52:09","modified_gmt":"2014-09-30T07:52:09","slug":"esempio-di-programma-con-keylistener","status":"publish","type":"post","link":"https:\/\/liceocuneo.it\/oddenino\/esempio-di-programma-con-keylistener\/","title":{"rendered":"Esempio di programma con KeyListener"},"content":{"rendered":"<p>Cercare di migliorarne il funzionamento eliminando i bachi&#8230;<\/p>\n<pre>package inputnumerico;\r\n\r\nimport java.awt.event.KeyEvent;\r\nimport java.awt.event.KeyListener;\r\nimport javax.swing.JTextField;\r\n\r\npublic class JNumberField extends JTextField implements KeyListener {\r\n    \r\n    private String oldText = \"0\";\r\n    private double n = 0;\r\n    \r\n    public JNumberField() {\r\n        this.setText(\"0\");\r\n        this.setColumns(10);\r\n        this.addKeyListener(this);\r\n    }\r\n\r\n    public double getN() {\r\n        return n;\r\n    }\r\n\r\n    public void setN(double n) {\r\n        this.n = n;\r\n    }\r\n\r\n    @Override\r\n    public void keyTyped(KeyEvent ke) {\r\n    }\r\n\r\n    @Override\r\n    public void keyPressed(KeyEvent ke) {\r\n    }\r\n\r\n    @Override\r\n    public void keyReleased(KeyEvent ke) {\r\n        try {\r\n            String newText = this.getText();\r\n            n = Double.parseDouble(newText);\r\n            oldText = newText;\r\n        } catch (NumberFormatException numberFormatException) {\r\n            this.setText(oldText);\r\n        }\r\n    }\r\n    \r\n}\r\n<\/pre>\n","protected":false},"excerpt":{"rendered":"<p>Cercare di migliorarne il funzionamento eliminando i bachi&#8230; package inputnumerico; import java.awt.event.KeyEvent; import java.awt.event.KeyListener; import javax.swing.JTextField; public class JNumberField extends JTextField implements KeyListener { private String oldText = &#8220;0&#8221;; private double n = 0; public JNumberField() { this.setText(&#8220;0&#8221;); this.setColumns(10); this.addKeyListener(this); } public double getN() { return n; } public void setN(double n) { this.n = &hellip; <a href=\"https:\/\/liceocuneo.it\/oddenino\/esempio-di-programma-con-keylistener\/\" class=\"more-link\">Continua a leggere <span class=\"screen-reader-text\">Esempio di programma con KeyListener<\/span><\/a><\/p>\n","protected":false},"author":4,"featured_media":0,"comment_status":"closed","ping_status":"closed","sticky":false,"template":"","format":"standard","meta":{"footnotes":""},"categories":[12],"tags":[],"class_list":["post-1236","post","type-post","status-publish","format-standard","hentry","category-informatica"],"_links":{"self":[{"href":"https:\/\/liceocuneo.it\/oddenino\/wp-json\/wp\/v2\/posts\/1236","targetHints":{"allow":["GET"]}}],"collection":[{"href":"https:\/\/liceocuneo.it\/oddenino\/wp-json\/wp\/v2\/posts"}],"about":[{"href":"https:\/\/liceocuneo.it\/oddenino\/wp-json\/wp\/v2\/types\/post"}],"author":[{"embeddable":true,"href":"https:\/\/liceocuneo.it\/oddenino\/wp-json\/wp\/v2\/users\/4"}],"replies":[{"embeddable":true,"href":"https:\/\/liceocuneo.it\/oddenino\/wp-json\/wp\/v2\/comments?post=1236"}],"version-history":[{"count":0,"href":"https:\/\/liceocuneo.it\/oddenino\/wp-json\/wp\/v2\/posts\/1236\/revisions"}],"wp:attachment":[{"href":"https:\/\/liceocuneo.it\/oddenino\/wp-json\/wp\/v2\/media?parent=1236"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/liceocuneo.it\/oddenino\/wp-json\/wp\/v2\/categories?post=1236"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/liceocuneo.it\/oddenino\/wp-json\/wp\/v2\/tags?post=1236"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}