protected void jButton1ActionPerformed(ActionEvent evt){ //TODO add your handler code here String aa = jTextField1.getText(); if (aa.length()>0) jTextField1.setText(aa.substring(0,aa.length()-1));
}
一个字符串,然后ss=substring(0,××××.length-1)
Button.addActionListener(new ActionListener(){ public void actionPerformed(ActionEvent e){ TextField.setText(0, TextField.getText().length()-1); } });
//TODO add your handler code here
String aa = jTextField1.getText();
if (aa.length()>0)
jTextField1.setText(aa.substring(0,aa.length()-1));
}
public void actionPerformed(ActionEvent e){
TextField.setText(0, TextField.getText().length()-1);
}
});
String str="";