25 lines
792 B
Java
25 lines
792 B
Java
import javax.swing.text.PlainDocument;
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import javax.swing.text.AttributeSet;
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import javax.swing.text.BadLocationException;
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public class JTextFieldCharLimit extends PlainDocument
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{
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private int max;
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JTextFieldCharLimit(int max) {
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super();
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this.max = max;
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}
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public void insertString(int offset, String text, AttributeSet attr) throws BadLocationException {
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if (text == null){
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return;
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}
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StringBuilder sb = new StringBuilder();
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sb.append(getText(0, getLength()));
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sb.insert(offset, text);
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/* Vérifier si le texte ne contient que des chiffres de 1 à 9 et si il ne depasse pas 4 caractères */
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if (sb.length() <= max && sb.toString().matches("[1-9]*")) {
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super.insertString(offset, text, attr);
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}
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}
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} |