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int s = JOptionPane.showConfirmDialog(null, "紜畾瑕佹彁浜ゅ悧", "鎻愪氦", JOptionPane.YES_NO_CANCEL_OPTION);
if (s == 0) {
JOptionPane.showMessageDialog(null, "浣犵偣鐨勬槸紜畾錛?);
}
if (s == 1) {
JOptionPane.showMessageDialog(null, "浣犵偣鐨勬槸鍚︼紒");
}
if (s == 2) {
JOptionPane.showMessageDialog(null, "浣犵偣鐨勬槸鍙栨秷錛?);
}
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/Files/muoutang/Caculator.rar
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import java.text.DecimalFormat;
public class Line {
public static void main(String[] args){
DecimalFormat df = new DecimalFormat("#,#0.0#");
float agb = 1.256464564f;
float baifenbi = agb;
System.out.print(df.format(baifenbi));//jdk1.5鍙?qiáng)浠ヤ笂鏈夎嚜鍔畣鍘熷鏁版嵁绫诲瀷铦{涓哄寘瑁呯被
}
}
public class Line {
public static void main(String[] args){
DecimalFormat df = new DecimalFormat("#,#0.0#");
float agb = 1.256464564f;
float baifenbi = agb;
System.out.print(df.format(baifenbi));//jdk1.5鍙?qiáng)浠ヤ笂鏈夎嚜鍔畣鍘熷鏁版嵁绫诲瀷铦{涓哄寘瑁呯被
}
}
鏃ユ湡鏍煎紡鍖?br>//鑾峰彇褰撳墠緋葷粺鏃ユ湡鍜屾椂闂寸殑鏂規(guī)硶
import java.text.SimpleDateFormat;
import java.util.Date;
public class TestDate {
public static void main(String[] args) throws Exception {
SimpleDateFormat sdf = new SimpleDateFormat("yyyy-MM-dd HH:mm:ss"); //鏍煎紡涓虹壒鏈夌殑,API鏂囨。涓湁
SimpleDateFormat sdf = new SimpleDateFormat("yyyy騫碝M鏈坉d鏃?HH:mm:ss");//
Date d = new Date();
System.out.println(sdf.format(d));
}
}
/**
* 鏌ョ湅API鏂囨。
java.text
Class SimpleDateFormat
java.lang.Object
java.text.Format
java.text.DateFormat
java.text.SimpleDateFormat
*/
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1銆佺▼搴忚繍琛屾椂鍑虹幇寮傚父錛屼細(xì)鑷姩鐢熸垚涓涓紓甯哥被瀵硅薄,璇ュ璞¤鎻愪氦(鎶涘嚭)緇檍ava铏氭嫙鏈猴紝浜ょ粰铏氭嫙鏈虹▼搴忓氨涓
2銆佽鍦ㄥ紓甯鎬氦緇欒櫄鎷熸満涔嬪墠閫綇,璇ヨ繃紼嬬О涓烘崟鑾峰紓甯?
3銆佹崟鑾峰紓甯歌榪涜涓浜涘鐞?br>
鎶涘嚭寮傚父
1錛塉AVA鑷甫鐨勶紝API涓殑鍖呯被涓殑鏂規(guī)硶鎸囧畾鏈夊啓throws鐨勬柟娉曪紝鐢辯郴緇熻嚜鍔ㄦ姏鍑?
2錛夌敤鎴風(fēng)▼搴忚嚜瀹氫箟鐨勫紓甯鎬笉鑳界敱緋葷粺鑷姩鎶涘嚭錛屽畾涔夊悗,騫朵笖蹇呴』鐢╰hrow璇彞鎶涘嚭榪欎釜寮傚父綾葷殑瀵硅薄
throw 寮傚父瀵硅薄;
娉?
1銆乼hrow璇彞涓鑸瀹氫箟涓烘弧瓚充竴瀹氭潯浠舵椂鎵ц.濡傛斁鍦?span style="COLOR: red"> if 鍒嗘敮涓?
2銆佷嬌鐢╰hrow璇彞鐨勬柟娉?鎴栬呰皟鐢ㄥ叾浠栫被鐨勬湁寮傚父鎶涘嚭鐨勬柟娉曟椂,搴斿湪鏂規(guī)硶澶村畾涔変腑澧炲姞throws寮傚父綾誨悕鍒楄〃.
鎹曡幏寮傚父,涔熷彲浠ヤ笉鍐?br>
class ByteSizeException extends Exception {
ByteSizeException() {
System.out.println("\n瓚呭嚭瀛楄妭鑼冨洿鐨勬暟瀛?);
}
}
public class TestException {
protected TestException() {
}
public static void main(String args[]) throws ByteSizeException{ //鍙互涓嶅啓
try {
int num = Integer.parseInt(args[0]);
if (num <= 127 && num >= -128 ) {
System.out.println("\n瀛楄妭鍊?"+num);
}
else {
throw new ByteSizeException();
}
} catch (Exception e) {
System.out.println("浣犺緭鍏ョ殑涓嶆槸鏁板瓧");
}
}
}
try{
……
}
catch(寮傚父綾誨悕 瀵硅薄鍚?{
……
}
catch(寮傚父綾誨悕 瀵硅薄鍚?{
……
} finally{
……
}
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閲岄潰鏈夋晥鏋滄湁婧愪唬鐮?br>
| JTable | |
| JTree | |
| JList | |
| JToolTip | |
| JComboBox | |
| JMenu | |
| JTabbedPane | |
| Border | |
| JSlider |
涓嬭澆鍦板潃/Files/muoutang/swing_example.rar
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