日数自动更新

最新推荐文章于 2022-05-06 16:48:55 发布

原创最新推荐文章于 2022-05-06 16:48:55 发布 · 540 阅读

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本文介绍了一个日期选择器的实现方法，通过监听年份和月份的选择，动态更新日期显示，确保了不同月份的日期显示符合实际情况。

Days will change after selecting Year , Month.

XYear.addItemListener(new java.awt.event.ItemListener() {
public void itemStateChanged(ItemEvent ie){ //set Listener to Day after selecting Year, Feb
String sy=XYear.getSelectedItem().toString();
if (Integer.parseInt(sy)%4==0 && XMonth.getSelectedItem().toString()=="2") {
XDay.addItem("1"); XDay.addItem("2");XDay.addItem("3");XDay.addItem("4");XDay.addItem("5");XDay.addItem("6");XDay.addItem("7");XDay.addItem("8");XDay.addItem("9");XDay.addItem("10");XDay.addItem("11"); XDay.addItem("12");XDay.addItem("13");XDay.addItem("14");XDay.addItem("15");XDay.addItem("16");XDay.addItem("17");XDay.addItem("18");XDay.addItem("19");XDay.addItem("20");XDay.addItem("21"); XDay.addItem("22");XDay.addItem("23");XDay.addItem("24");XDay.addItem("25");XDay.addItem("26");XDay.addItem("27");XDay.addItem("28");XDay.addItem("29");
}
else if (Integer.parseInt(sy)%4!=0 && XMonth.getSelectedItem().toString()=="2") {
XDay.addItem("1"); XDay.addItem("2");XDay.addItem("3");XDay.addItem("4");XDay.addItem("5");XDay.addItem("6");XDay.addItem("7");XDay.addItem("8");XDay.addItem("9");XDay.addItem("10");XDay.addItem("11"); XDay.addItem("12");XDay.addItem("13");XDay.addItem("14");XDay.addItem("15");XDay.addItem("16");XDay.addItem("17");XDay.addItem("18");XDay.addItem("19");XDay.addItem("20");XDay.addItem("21"); XDay.addItem("22");XDay.addItem("23");XDay.addItem("24");XDay.addItem("25");XDay.addItem("26");XDay.addItem("27");XDay.addItem("28");
}
}
});

XMonth.setModel(new javax.swing.DefaultComboBoxModel(new String[] { "1", "2", "3", "4", "5", "6", "7", "8", "9", "10", "11", "12" }));//set default value to Month
mm=cal.get(Calendar.MONTH);
++mm;
XMonth.setSelectedItem(String.valueOf(mm)); //set current Month as default value
XMonth.addItemListener(new java.awt.event.ItemListener() { //set Listener to Day after selecting Year, Month except for Feb
public void itemStateChanged(ItemEvent ie){
String sm=XMonth.getSelectedItem().toString();
if (sm=="1" || sm=="3" || sm=="5" || sm=="7" || sm=="8" || sm=="10" || sm=="12"){ //month of 31days
XDay.removeAllItems();
XDay.addItem("1"); XDay.addItem("2");XDay.addItem("3");XDay.addItem("4");XDay.addItem("5");XDay.addItem("6");XDay.addItem("7");XDay.addItem("8");XDay.addItem("9");XDay.addItem("10");XDay.addItem("11"); XDay.addItem("12");XDay.addItem("13");XDay.addItem("14");XDay.addItem("15");XDay.addItem("16");XDay.addItem("17");XDay.addItem("18");XDay.addItem("19");XDay.addItem("20");XDay.addItem("21"); XDay.addItem("22");XDay.addItem("23");XDay.addItem("24");XDay.addItem("25");XDay.addItem("26");XDay.addItem("27");XDay.addItem("28");XDay.addItem("29");XDay.addItem("30");XDay.addItem("31");
}
else if (sm=="4" || sm=="6" || sm=="9" || sm=="11"){ //month of 30days
XDay.removeAllItems();
XDay.addItem("1"); XDay.addItem("2");XDay.addItem("3");XDay.addItem("4");XDay.addItem("5");XDay.addItem("6");XDay.addItem("7");XDay.addItem("8");XDay.addItem("9");XDay.addItem("10");XDay.addItem("11"); XDay.addItem("12");XDay.addItem("13");XDay.addItem("14");XDay.addItem("15");XDay.addItem("16");XDay.addItem("17");XDay.addItem("18");XDay.addItem("19");XDay.addItem("20");XDay.addItem("21"); XDay.addItem("22");XDay.addItem("23");XDay.addItem("24");XDay.addItem("25");XDay.addItem("26");XDay.addItem("27");XDay.addItem("28");XDay.addItem("29");XDay.addItem("30");
}

else if (sm=="2"){ //Feb
XDay.removeAllItems();
String sy=XYear.getSelectedItem().toString();
if (Integer.parseInt(sy)%4==0) {
XDay.addItem("1"); XDay.addItem("2");XDay.addItem("3");XDay.addItem("4");XDay.addItem("5");XDay.addItem("6");XDay.addItem("7");XDay.addItem("8");XDay.addItem("9");XDay.addItem("10");XDay.addItem("11"); XDay.addItem("12");XDay.addItem("13");XDay.addItem("14");XDay.addItem("15");XDay.addItem("16");XDay.addItem("17");XDay.addItem("18");XDay.addItem("19");XDay.addItem("20");XDay.addItem("21"); XDay.addItem("22");XDay.addItem("23");XDay.addItem("24");XDay.addItem("25");XDay.addItem("26");XDay.addItem("27");XDay.addItem("28");XDay.addItem("29");
}
else {
XDay.addItem("1"); XDay.addItem("2");XDay.addItem("3");XDay.addItem("4");XDay.addItem("5");XDay.addItem("6");XDay.addItem("7");XDay.addItem("8");XDay.addItem("9");XDay.addItem("10");XDay.addItem("11"); XDay.addItem("12");XDay.addItem("13");XDay.addItem("14");XDay.addItem("15");XDay.addItem("16");XDay.addItem("17");XDay.addItem("18");XDay.addItem("19");XDay.addItem("20");XDay.addItem("21"); XDay.addItem("22");XDay.addItem("23");XDay.addItem("24");XDay.addItem("25");XDay.addItem("26");XDay.addItem("27");XDay.addItem("28");
}
}
}
});