int num = 40000;
byte first = num/256;
byte second = num%256;
榪欐牱錛屽彧瑕?/span>first鎴?/span>second瓚呰繃127錛屽氨浼?xì)婧㈠嚭锛屼粠鑰屽悎騫惰搗鏉ョ殑int鏁板間細(xì)鍜屽師鏁板間笉涓鑷淬?/span>
int input2 = 130;
byte a3 = (byte) input2;
input2 = a3;
System.out.println(input2);
瀵逛簬涓婅堪浠g爜錛岀粨鏋滀負(fù)-126錛岃屼笉鏄紑濮嬬殑130錛屼篃鏄孩鍑虹殑闂錛屾墍浠ヤ竴瀹氳娉ㄦ剰銆?/span>
瑙e喅鏂規(guī)硶錛?/span>
絎竴縐嶏細(xì)杈冧負(fù)涓嶅交搴曪紝瀵逛簬姝f暣鏁版潵璇達(dá)紝鍙互闄や互127錛屼粠鑰屼嬌byte涓嶄細(xì)婧㈠嚭
絎簩縐嶏細(xì)杞寲鐨勬椂鍊欐寜浣嶆搷浣滐紝浠庤屼笉浣跨敤寮哄埗杞寲鎹熷け綺懼害錛?/span>
// 灝?/span>iSource杞負(fù)闀垮害涓?/span>iArrayLen鐨?/span>byte鏁扮粍錛屽瓧鑺傛暟緇勭殑浣庝綅鏄暣鍨嬬殑浣庡瓧鑺備綅
public static byte[] toByteArray(int iSource, int iArrayLen)
{
byte[] bLocalArr = new byte[iArrayLen];
for ( int i = 0; (i < 4) && (i < iArrayLen); i++)
{
bLocalArr[i] = (byte)( iSource>>8*i & 0xFF );
}
return bLocalArr;
}
// 灝?/span>byte鏁扮粍bRefArr杞負(fù)涓涓暣鏁?/span>,瀛楄妭鏁扮粍鐨勪綆浣嶆槸鏁村瀷鐨勪綆瀛楄妭浣?/span>
public static int toInt(byte[] bRefArr)
{
int iOutcome = 0;
byte bLoop;
for ( int i =0; i<4 ; i++)
{
bLoop = bRefArr[i];
iOutcome+= (bLoop & 0xFF) << (8 * i);
}
return iOutcome;
}
JToolTip鏄寚褰撻紶鏍囧仠鐣欏湪涓涓帶浠朵笂鏃舵樉紺虹殑涓涓寘鍚浉鍏充俊鎭殑鏂規(guī)錛屽叾涓彲浠ヤ嬌鐢?/span>setToolTipText()鏂規(guī)硶鏉ヨ緗叾涓殑鍐呭錛岃繖閲屽彲浠ヤ嬌鐢?/span>HTML璇█鏉ュ疄鐜版洿澶氱殑鏁堟灉錛堟崲琛屻佽〃鏍箋佸浘鐗囩瓑錛夛紝鏄劇ず鍐呭榪樻槸寰堝鐨勩備笅闈㈡槸JDK婧愪唬鐮侊細(xì)
public void setToolTipText(String text) {
String oldText = getToolTipText();
putClientProperty(TOOL_TIP_TEXT_KEY, text);
ToolTipManager toolTipManager = ToolTipManager.sharedInstance();
if (text != null) {
if (oldText == null) {
toolTipManager.registerComponent(this);
}
} else {
toolTipManager.unregisterComponent(this);
}
}
浠庝笂闈唬鐮佸彲浠ョ湅鍑猴紝榪欓噷鏈変竴涓?/span>putClientProperty鏂規(guī)硶錛岀敤鏉ヨ緗?/span>TOOL_TIP_TEXT_KEY鐨勫睘鎬у間負(fù)text錛堣繖濂藉儚鏄釜鍝堝笇琛ㄧ殑鏍峰瓙錛夈?/span>oldText鍏堜粠getToolTipText()鏂規(guī)硶涓彇錛屽鏋滃彇鍒扮殑鏄┖鐨勶紙null錛夊茍涓斾紶榪涙潵鐨?/span>text涓嶄負(fù)絀猴紝灝辨敞鍐岀粰榪欎釜緇勪歡涓涓?/span>ToolTip銆?/span>
榪欎釜鎺т歡鏄潪甯告湁鐢ㄧ殑錛屽叾涓?/span>String getToolTipText(MouseEvent)鏄瘡涓?/span>JComponent閮藉疄鐜扮殑鏂規(guī)硶錛岀敤鏉ヨ幏鍙?/span>JToolTip鎺т歡鏄劇ず鐨勫唴瀹癸紝姝ゆ柟娉曢粯璁?/span>JDK浠g爜涓猴細(xì)
public String getToolTipText() {
return (String)getClientProperty(TOOL_TIP_TEXT_KEY);
}
灝辨槸浠?/span>TOOL_TIP_TEXT_KEY灞炴ф妸鍊煎彇鍑烘潵浣滀負(fù)榪斿洖鍊箋傚湪ToolTipManager鐨?/span>show鏂規(guī)硶涓紝灝辨湁榪欐牱涓鍙ワ細(xì)
toolTipText = insideComponent.getToolTipText();
榪欐牱灝辮鏄庝簡(jiǎn)濡傛灉緇勪歡閲嶈澆浜?/span>getToolTipText()鏂規(guī)硶錛屽氨鍙互鍦ㄦ樉紺?/span>ToolTip鐨勬椂鍊欐寚瀹氬唴瀹逛簡(jiǎn)銆傚鏋滆鍦ㄦ帶浠剁殑涓嶅悓浣嶇疆鏄劇ず涓嶅悓鐨?/span>ToolTip錛岃閲嶈澆public String getToolTipText(MouseEvent event)鏂規(guī)硶錛屼笅闈㈡槸ToolTipManager綾誨鐞嗛紶鏍囩Щ鍔ㄧ殑浠g爜錛?/span>
public void mouseMoved(MouseEvent event) {
if (tipShowing) {
checkForTipChange(event);
}
else if (showImmediately) {
JComponent component = (JComponent)event.getSource();
toolTipText = component.getToolTipText(event);
if (toolTipText != null) {
preferredLocation = component.getToolTipLocation(event);
mouseEvent = event;
insideComponent = component;
exitTimer.stop();
showTipWindow();
}
}
else {
// Lazily lookup the values from within insideTimerAction
insideComponent = (JComponent)event.getSource();
mouseEvent = event;
toolTipText = null;
enterTimer.restart();
}
}
鍔犱寒鏄劇ず鐨勫氨鏄嬌鐢ㄤ簡(jiǎn)閲嶈澆鏂規(guī)硶鐨勫湴鏂癸紙榪樻湁鍏朵粬涓浜涘湴鏂癸紝榪欓噷娌″叏鍒楋級(jí)銆?/span>
涓婇潰鐨勯昏緫鍙兘鏈変簺娣蜂貢錛屼富瑕佹槸璇村嚑涓被涔嬮棿鐨勫叧緋伙紙JComponent銆?/span>JToolTip鍜?/span>ToolTipManager涓変釜綾伙級(jí)錛屽鏋滆鍒╃敤SWING鏄劇ずToolTip錛屽彲浠ュ涓婇潰鐨勭被鏂規(guī)硶榪涜閲嶈澆鎴栧綾昏繘琛岀戶鎵挎潵杈懼埌鑷繁鎵闇瑕佺殑鏁堟灉銆備緥濡傦細(xì)
private class TipPanel extends JPanel
{
public TipPanel()
{
this.setSize(300, 300);
this.setBorder(new javax.swing.border.SoftBevelBorder (javax.swing.border.BevelBorder.RAISED));
}
public String getToolTipText(MouseEvent event)
{
return event.getPoint().toString();
}
}
灝遍噸杞戒簡(jiǎn)JComponent鐨?/span>getToolTipText(MouseEvent)鏂規(guī)硶錛岃繖鏍峰氨鍙互鍦ㄦJPanel涓Щ鍔ㄩ紶鏍囩殑鏃跺欑湅鍒版彁紺烘涓殑鍙樺寲浜?jiǎn)銆?/span>