?? jtextfield1.java
字號(hào):
package guanlixitong;
import java.awt.*;
import javax.swing.*;
import javax.swing.text.*;
public class JTextField1
extends JTextField {
public JTextField1() {
}
protected Document createDefaultModel() {
return new DocumentNO();
}
private class DocumentNO
extends PlainDocument {
public void insertString(int offs, String str, AttributeSet a) throws
BadLocationException {
if (str == null) {
return;
}
char[] upper = str.toCharArray();
int length = 0;
for (int i = 0; i < upper.length; i++) {
if ((upper[i] >= '0' && upper[i] <= '9')||upper[i]=='.') {
upper[length++] = upper[i];
}
}
super.insertString(offs, new String(upper, 0, length), a);
}
}
}
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