瀵硅薄鐨勪笁涓壒寰侊細
瀵硅薄鐨勮涓猴細榪欎釜瀵硅薄鑳藉仛浠涔堬紝涔熷氨鏄兘瀹屾垚浠涔堟牱鐨勫姛鑳姐傛瘮濡傝嚜琛岃濺鍙互杞芥垜浠兂鍘葷殑鍦版柟錛岃妭鐪佷綋鍔涖?/span>
瀵硅薄鐨勭姸鎬侊細褰撻氳繃涓涓搷綰靛璞＄殑鏂規(guī)硶鏃訛紝瀵硅薄鎵淇濇寔鐨勪竴縐嶅寘鍚壒瀹氱殑灞炴х殑鐘舵併傛瘮濡傛垜浠彲浠ラ氳繃鎵漿杞﹀ご錛屼嬌鑷杞︽嫄寮紱鍒硅濺鏃訛紝鍙互璁╄嚜琛岃濺鍑忛熸垨鍋滀笅鏉ャ?/span>
瀵硅薄鐨勬爣璇嗙錛氬彲浠ラ氳繃鏍囪瘑絎︼紝鍖哄埆鍏鋒湁鐩稿悓琛屼負鎴栫被浼肩姸鎬佺殑瀵硅薄銆傝鍒拌嚜琛岃濺錛屽彲浠ユ湁寰堝縐嶆牱瀛愮殑錛屽緢澶氱敓浜у巶瀹剁殑錛岄兘鍙互璇存槸鑷杞︼紝鍙互鏍規(guī)嵁棰滆壊錛岀敓浜у巶瀹剁瓑絳変笌鍏跺畠鐨勮嚜琛岃濺鍖哄垎銆?/span>
瀵硅薄鐨勫彞鏌?/span>
瀵硅薄鐨勫彞鏌勶細鎿嶇旱瀵硅薄鐨勬爣璇嗙錛屽畠鏄寚鍚戜竴涓璞＄殑鍙ユ焺銆傛牴鎹墠闈㈠鍙橀噺鐨勫畾涔夛紝鍙橀噺鍚嶆槸鍐呭瓨鍦板潃錛堟爤錛夌殑涓涓埆鍚嶏紝瀵逛簬鍩烘湰綾誨瀷鏉ヨ錛屽畠鐨勫煎氨鏄瓨鏀懼湪榪欎釜鍐呭瓨鍦板潃鐨勭┖闂村唴錛屽浜庡璞＄被鍨嬫潵璁詫紝瀹冪殑鍊兼槸涓涓寚鍚戝疄闄呭璞＄殑涓涓湴鍧錛堝爢錛夛紝鑰岀湡姝ｇ殑瀵硅薄鏄瓨鏀句簬鍫嗕腑錛屾垜浠氨鍙互鐞嗚В涓猴細榪欏氨鏄竴涓璞＄殑鍙ユ焺銆?/span>
渚嬪錛?/span>String str;
榪欓噷鍙嫢鏈変簡涓涓璞″彞鏌勶紝鍙ユ焺錛?/span>str錛夊茍娌℃湁涓庝換浣曞璞″唴瀹圭浉鍏寵仈銆傛搷綰靛彞鏌?/span>str鏃訛紝騫跺悜瀹冨彂閫佷竴鏉℃秷鎭紝榪欐椂緋葷粺浼氭彁紺洪敊璇傛墍浠ュ湪鍒涘緩瀵硅薄鍙ユ焺鏃訛紝涓瀹氫笉瑕佸繕璁板皢鍙ユ焺涓庡疄闄呯殑瀵硅薄鍐呭鐩稿叧鑱旓紙涔熷氨鏄璞″彉閲忕殑鍒濆鍖栵級銆?/span>
瀵硅薄鍙橀噺鐨勫垵濮嬪寲
瀵硅薄鍙橀噺鐨勫垵濮嬪寲鏄氳繃new鍏抽敭瀛楁潵瀹屾垚瀵硅薄鐨勫垱寤鴻繃紼嬨傚畠鏄悜鍐呭瓨鍫嗕腑鐢寵涓涓┖闂達紝灝嗚繖涓璞″唴瀹規(guī)斁鍒拌繖閲岋紝鐒跺悗灝嗗唴瀹逛笌瀵硅薄鍙ユ焺錛堝瓨鍦ㄤ簬鏍堜腑錛夊叧鑱旇搗鏉ャ?/span>
渚嬪錛?/span>String str = new String( “ Hello ” );
]]>
{
if(num>0)
{
return -1;
}
else if(num<=0)
{
return 0;
}
return 1;
}
鍒嗘瀽錛?br> 鍦ㄨ繖涓柟娉曚腑鎴戜滑涓撶敤铦椾簡榪斿洖璇彞鐨勭被鍨嬩負int鍨嬶紝褰撲富紼嬪簭璋冪敤榪欎釜鏂規(guī)硶鏃訛紝灝變細寰楀埌涓涓猧nt綾誨瀷鐨勮繑鍥炲鹼紝鍊肩殑鍐呭鍒嗗埆鏍規(guī)嵁涓嶅悓鐨勬儏鍐佃繑鍥?銆?銆佹垨-1銆備富紼嬪簭寰楀埌瀛愮▼搴忕殑榪斿洖鍊鹼紝灝變粠褰撳墠鏂規(guī)硶涓鍑猴紝榪斿洖鍒拌皟鐢ㄨ鏂規(guī)硶鐨勮鍙ュ錛岀戶緇▼搴忕殑鎵ц銆?br>… …
public int getValue()
{
return a*b/12;
}
… …
鍒嗘瀽錛?br> 鍦ㄨ繖孌典唬鐮佷腑榪斿洖鐨勬槸涓涓猧nt鍨嬬殑琛ㄨ揪寮忥紝鍦ㄤ富紼嬪簭璋冪敤鏃訛紝瀛愮▼搴忎細灝嗚繖涓〃杈懼紡鐨勫艱繘琛岃綆楋紝璁＄畻鏈虹殑緇撴灉浣滀負int鍨嬬殑鍊艱繑鍥炵粰涓葷▼搴忥紝涓葷▼搴忓緱浠ョ戶緇繘琛屻傚鏋滆繑鍥炲肩殑綾誨瀷鎴栬繑鍥炲兼粦寰楀埌姝ｇ‘鐨勭粨鏋滐紝紼嬪簭灝變細鍑虹幇閿欒銆?br>娉ㄦ剰錛氳繑鍥炲肩殑鏁版嵁綾誨瀷蹇呴』涓庢柟娉曞０鏄庝腑鐨勬暟鎹被鍨嬩竴鑷淬?br>
return絎簩涓敤澶勶細
濡傛灉鍦ㄧ▼搴忚繍琛岃繃紼嬩腑錛屾垜浠彧甯屾湜璋冪敤瀛愮▼搴忥紝騫跺畬鎴愬瓙紼嬪簭鐨勫姛鑳斤紝鑰屼笉闇瑕佸瓙紼嬪簭榪斿洖浠諱綍鏁板鹼紝閭ｄ箞鎴戜滑鍙渶瑕佸湪瀛愮▼搴忕殑緇撴潫澶勫姞涓婁竴鏉¤鍙?br> return;
褰撶劧鐢ㄦ病鏈夎繑鍥炲肩殑榪斿洖璇彞鏃訛紝鍦ㄦ柟娉曠殑澹版槑涓繀欏繪槑紜０鏄庤繑鍥炲肩被鍨嬩負void銆?br>… …
public void setValue()
{
value=a*b/12;
return;
}
… …
鍒嗘瀽錛?br> 褰撲富紼嬪簭璋冪敤璇ユ柟娉曟椂錛屼細灝唙alue榪涜璧嬪鹼紝璧嬪肩粨鏉熷悗浼氳繑鍥炲埌涓葷▼搴忥紝鍦ㄨ繖縐嶆儏鍐典笅錛屾垜浠竴鑸笉鍐檙eturn璇彞錛屾柟娉曡皟鐢ㄥ畬鎴愬悗錛岀郴緇熶篃浼氳嚜鍔ㄥ洖鍒版柟娉曡皟鐢ㄥ錛屾帴鐫榪涜紼嬪簭鐨勬墽琛屻?/span>
]]>
璇硶錛?/p>
switch(琛ㄨ揪寮?
{
case甯擱噺1:
璇彞1
[break;]
case甯擱噺2:
璇彞2
[break;]
…
case甯擱噺n:
璇彞n
[break;]
[default:]
榛樿澶勭悊璇彞
[break;]
}
娉ㄦ剰錛?o:p>
1錛塻witch(琛ㄨ揪寮?榪斿洖鐨勫煎繀欏繪槸1錛塨yte鍨嬨?錛塩har鍨嬨?錛塻hort鍨嬨?錛塱nt鍨嬨?/p>
2錛夊父閲忕殑鍊煎繀欏誨拰琛ㄨ揪寮忕殑鍊肩殑綾誨瀷鐩鎬竴鑷淬?/p>
3錛夊父閲忕殑鍊間笉鍏佽鍑虹悊閲嶅鐨勩?/p>
4錛塨reak浣滅敤鏄粨鏉焥witch寮鍏寵鍙ャ?/p>
5錛夊湪涓浜涚壒孌婄殑鎯呭喌涓嬶紝鍙互鍐欐垚錛?/p>
…
case 甯擱噺n:
case 甯擱噺n+1:
璇彞
[break;]
…
渚嬶細鍛戒護琛屼紶1涓弬鏁幫紝瑕佹眰鏄?鑷?00涔嬮棿鐨勬暟錛屼笉鏄暣鏁扮殑璇濆氨閫鍑篔VM錛屼紶鐨勫弬鏁板ぇ浜庣瓑浜?0鏃訛紝杈撳嚭“浼樼”錛屽鏋滃皬浜?0澶т簬絳変簬70涔嬮棿鐨勬暟錛岃緭鍑?#8220;鑹ソ”錛屽皬浜?0澶т簬絳変簬60鏃訛紝杈撳嚭“鍙婃牸”錛屽鏋滃皬浜?0杈撳嚭“涓嶅強鏍鹼紝璇風(fēng)戶緇姫鍔?#8221;銆?/p>
class Switch
{
public static void main(String[] args)
{
System.out.println("璇瘋緭鍏ユ垚緇╋紒");
int shu=Integer.parseInt(args[0]);
if((args.length!=1)||(shu<0||shu>100))
{
System.err.println("杈撳叆閿欒錛岃閲嶆柊鎵ц錛?);
System.exit(-1);
}
String chengji;
switch(shu/10)
{
case 10:
case 9:
chengji="浼樼";
break;
case 8:
case 7:
chengji="鑹ソ";
break;
case 6:
chengji="鍙婃牸";
break;
case 5:
case 4:
case 3:
case 2:
case 1:
case 0:
chengji="涓嶅強鏍鹼紝璇風(fēng)戶緇姫鍔?;
break;
default:
chengji="璇瘋緭鍏ヤ竴涓?鑷?00涔嬮棿鐨勬暟";
}
System.out.println("鎴愮嘩錛?+chengji);
}
}
]]>
{
public static void main(String[] args)
{
outer:
for(int i=0;i<5;i++)
{
System.out.println("i="+i);
inner:
for(int j=0;j<3;j++)
{
System.out.println("j="+j);
if(j%2==0)
{
System.out.println("countinue inner");
continue inner;
}
if(i%2==1)
{
System.out.println("continue outer");
continue outer;
}
if(i==3)
{
System.out.println("break outer");
break outer;
}
}
}
System.out.println("this is all over!");
}
}
杈撳嚭緇撴灉錛?br> i=0
j=0
continue inner
j=1
j=2
continue inner
i=1
j=0
continue inner
j=1
continue outer
i=2
j=0
continue inner
j=1
j=2
continue inner
i=3
j=0
continue inner
j=1
continue outer
i=4
j=0
continue inner
j=1
j=2
continue inner
this is all over!
鍒嗘瀽錛?br> continue浼氱粨鏉焛nner鐨勫綋嬈″驚鐜紝騫跺埌杈緄nner鏍囩鐨勫紑濮嬩綅緗紝閲嶆柊榪涘叆绱ф帴鍦ㄩ偅涓爣絳懼悗闈㈢殑寰幆銆?br> continue浼氱粨鏉無uter鐨勫綋嬈″驚鐜紝騫跺埌杈緊uter鏍囩鐨勫紑濮嬩綅緗紝閲嶆柊榪涘叆绱ф帴鍦ㄩ偅涓爣絳懼悗闈㈢殑寰幆銆?br> break浼氫腑鏂綋鍓嶇殑outer寰幆錛屽茍鍒拌揪鏍囩outer鎸囩ず寰幆鐨勬湯灝俱?
]]>
{
public static void main(String[] args)
{
for(int i=1;i<20;i++)
{
if(i%2==0)
continue;
System.out.print(" "+i);
}
System.out.println("\n the Reptation is over!");
}
}
杈撳嚭緇撴灉錛?br> 1 3 5 7 9 11 13 15 17 19
the Reptation is over!
緇撹錛?br> 緇х畫璇彞緇撴潫鐨勬槸褰撳墠鐨勫驚鐜紝涓嶈煩鍑哄驚鐜綋錛屾帴鐫寮濮嬩笅涓嬈＄殑寰幆銆?
]]>
public class BreakTest
{
public static void main(String[] args)
{
for(int i=1;i<20;i++)
{
if(i==10)
break;
System.out.print(" "+i);
}
System.out.println("\n the Reptation is over!");
}
}
杈撳嚭緇撴灉錛?br>1 2 3 4 5 6 7 8 9
the Reptation is over!
鍒嗘瀽錛?br> 褰搃=10鏃訛紝寰幆緇撴潫錛岃緭鍑虹粨鏉熻鍙ャ?br> 緇撹錛氫腑鏂驚鐜槸涓柇鏁翠釜寰幆浣擄紝鐩存帴璺沖嚭寰幆浣擄紝鎵ц涓嬮潰鐨勮鍙ャ?br>
]]>
涓銆佷笉紜畾寰幆
鎵璋撲笉紜畾寰幆錛屼篃灝辨槸鎴戜滑涓嶈兘紜畾寰幆鎵瑕佹墽琛岀殑嬈℃暟錛屾墽琛岀殑嬈℃暟鏄牴鎹▼搴忎腑鍙傛暟鐨勫彉鍖栬嚜鍔ㄦ帶鍒剁殑銆?/p>
瀹冧富瑕佹湁涓ょ琛ㄧ幇褰㈠紡錛氱涓縐嶅艦寮忔槸while褰㈠紡錛岀浜岀褰㈠紡鏄痙o/while褰㈠紡銆?/p>
1錛?nbsp;while
瀹冪殑鑻辮鎰忔濆氨鏄?#8220;褰?#8221;錛屽畠鍦ㄥ驚鐜帶鍒朵腑涔熷彲浠ヨ繖鏍風(fēng)悊瑙ｏ紝瀹冪殑璇硶鏍煎紡鏄細
while(鏉′歡)
{
鐩殑涓;
鐩殑浜?
……
}
鎹㈡垚涓枃鐨勫惈涔夊氨鏄?#8220;褰撴潯浠朵負鐪熸椂錛屽氨鎵ц寰幆浣擄紝褰撴潯浠朵負鍋囨椂錛屽氨涓嶆墽琛屽驚鐜綋銆?#8221;
涓嬮潰鎴戜滑緙栧啓涓涓瘮杈冩湁鎰忔濈殑紼嬪簭鏉ヨ鏄庤繖涓粨鏋勶細
鎴戠殑鍚屼簨灝忔潕鑷粠鍙傚姞宸ヤ綔浠ュ悗錛屾瘡涓湀閮借浜ょ撼涓瀹氱殑浣忔埧鍩洪噾錛屼互鍑嗗涔版埧瀛愩傜幇鍦ㄤ粬姣忎釜鏈堝伐璧勬槸2000鍏冿紝浠ュ悗姣忓勾鎸?0%鐨勬瘮渚嬪鍔狅紝鍏朵腑宸ヨ祫鐨?%鏄敤鏉ヤ氦綰充綇鎴垮熀閲戠殑錛屼粬鎯崇煡閬撳灝戝勾鍚庯紝浠栧彲浠ユ湁20涓囧厓浣忔埧鍩洪噾銆?/p>
/*while寰幆鎺у埗緇撴瀯鐨勬祴璇?/
public class BuyHouse
{
public static void main(String[] args)
{
final double HOUSEFUND = 200000;
double salary = 2000;
double fund = 0;
int years = 1;
while(fund < HOUSEFUND)
{
fund += salary * 0.05 * 12;
years++
salary = salary * 1.1;
}
System.out.println(“the total years is :” + years);
System.out.println(“the total fund is :” + fund);
}
}
杈撳嚭緇撴灉錛歵he total years is :32
The total fund is :218332.10994930082
紼嬪簭鍒嗘瀽錛?/p>
鍦ㄥ紑濮嬬殑鏃跺欙紝鎴戜滑騫朵笉鐭ラ亾闇瑕佸灝戝勾錛屼絾鎴戜滑鐭ラ亾瀹冪殑緇撴潫鏉′歡錛岄偅灝辨槸鍩洪噾闇瑕佽揪鍒?0涓囧厓銆傛垜浠互瀹冧綔涓虹▼搴忕粨鏉熺殑鏉′歡錛岃繘琛屽驚鐜傞氳繃榪欎釜紼嬪簭鎴戜滑鍙互鎬葷粨鍑轟互涓嬪嚑鐐癸細
1銆佸驚鐜紑濮嬫墽琛岀殑鏉′歡鏄負鐪燂紱
2銆佸繀欏昏鏈変嬌紼嬪簭緇撴潫鐨勮嚜鍙橀噺鍦ㄥ彉鍖栵紱
3銆佸驚鐜垽鏂潯浠朵負鍋囨椂錛岀▼搴忎腑姝㈠驚鐜?/p>
2錛塪o/while
鎴戜滑鍏堟妸鍓嶉潰鐨勭▼搴忓仛涓涓敼閫狅紝鏉ユ瘮杈冧竴涓嬩袱涓▼搴忕殑鍖哄埆錛?/p>
/*while寰幆鎺у埗緇撴瀯鐨勬祴璇?/
public class BuyHouse2
{
public static void main(String[] args)
{
final double HOUSEFUND = 200000;
double salary = 2000;
double fund = 0;
int years = 1;
do
{
fund += salary * 0.05 *12;
years++;
salary = salary * 1.1;
}
while(fund < HOUSEFUND);
System.out.println(“the total years is :” + years);
System.out.println(“the total fund is:” + fund);
}
}
杈撳嚭緇撴灉錛歵he total years is :32
the total fund is :218332.10994930082
鎴戜滑鍐嶇湅涓や釜灝忕▼搴忥紝騫跺姣斾竴涓嬩粬浠殑杈撳嚭錛?/p>
/*嫻嬭瘯涓嶇‘瀹氬驚鐜殑涓ょ琛ㄧ幇褰㈠紡鐨勫尯鍒?/
public class DifferTest
{
public static void main(String[] args)
{
int i = 2;
do
{
i++;
System.out.println(“the value I is:” + i);
}
while(I < 2);
}
}
杈撳嚭緇撴灉錛歵he value i is:3
/*嫻嬭瘯涓嶇‘瀹氬驚鐜殑涓ょ琛ㄧ幇褰㈠紡鐨勫尯鍒?/
public class DifferTest2
{
public static void main(String[] args)
{
Int i = 2;
while (i < 2)
{
i++;
System.out.println(“the value I is:” + i);
}
}
}
榪欎釜娌℃湁浠諱綍杈撳嚭緇撴灉錛岃繖涓ょ褰㈠紡鏄湁涓瀹氬樊鍒殑錛歸hile璇彞鏄厛榪涜鏉′歡鍒ゆ柇錛屽啀榪涜寰幆浣撶殑澶勭悊錛沝o/while璇彞鏄厛榪涜寰幆浣撶殑澶勭悊鍐嶅垽鏂潯浠惰鍙ワ紝涔熷氨鏄湪鎵ц鍒ゆ柇涔嬪墠宸茬粡灝嗗驚鐜綋鍐呯殑閫昏緫澶勭悊浜嗕竴閬嶃?/p>
浜屻佺‘瀹氬驚鐜?/span>
for()寰幆鏄渶綆鍗曠殑寰幆璇彞錛屽畠鍙互閫氳繃璁℃暟鍣ㄦ垨鍦ㄦ瘡嬈″驚鐜悗淇敼鏌愪釜綾諱技浜庤鏁板櫒鍙橀噺鐨勫兼潵鎺у埗瀹冦傚畠鐨勬牸寮忓涓嬶細
for(鍒濆鍖栬〃杈懼紡錛涘垽鏂〃杈懼紡錛涢掑錛堟垨閫掑噺錛夎〃杈懼紡)
{
鎵ц璇彞錛?/span>
}
鍒濆鍖栬〃杈懼紡錛?/em>瀹冩槸鐢ㄦ潵璁懼畾寰幆鎺у埗鍙橀噺鐨勫垵濮嬪鹼紝涔熷氨鏄驚鐜殑璧風(fēng)偣銆?/p>
鍒ゆ柇琛ㄨ揪寮?/em>錛氱敤鏉ュ垽鏂驚鐜槸鍚︾粨鏉熺殑琛ㄨ揪寮忥紝涔熷氨鏄驚鐜殑緇堢偣銆傜▼搴忓驚鐜槸鍚︽寔緇繘琛岀敱鍒ゆ柇琛ㄨ揪寮忓喅瀹氾紱閫氬父鍒ゆ柇琛ㄨ揪寮忔槸鍏崇郴琛ㄨ揪寮忥紝褰撳叧緋昏〃杈懼紡鐨勫間負鐪熸槸錛岀▼搴忕戶緇繘琛屽驚鐜紝褰撳叧緋昏〃杈懼紡鐨勫間負鍋囨椂錛屽驚鐜粨鏉熴?/p>
閫掑錛堥掑噺錛夎〃杈懼紡錛?/em>鏄驚鐜帶鍒跺彉閲忕殑閫掑錛屼篃鍙互鏄掑噺銆傚畠鍙堢О涓哄驚鐜帶鍒剁殑姝ラ暱錛屼篃灝辨槸姣忔寰幆錛屽驚鐜彉閲忓闀匡紙鎴栧噺灝戯級鐨勯熷害銆?/p>
for()璇彞鐨勬渶鍚庝笉鑳芥湁浠諱綍絎﹀彿錛岄渶瑕佺壒鍒敞鎰忋?/p>
渚嬪錛氭垜浠悜鎺у埗鍙拌緭鍑?鍒?0涔嬮棿鐨勬暟瀛椼?/p>
/*杈撳嚭鏁板瓧鍒版帶鍒跺彴*/ Public class Circle { Public static void main(String[] args) { For(int I = 1; I < 10; i++) { System.out.println(“ ” + i); } } } 杈撳嚭緇撴灉錛? 2 3 4 5 6 7 8 9 10 閽堝浜巉or()寰幆鎺у埗緇撴瀯錛屾湁浠ヤ笅闂璇瘋鑰呮敞鎰忥細 1銆佸鏋滃湪鍒濆鍖栬〃杈懼紡瀹氫箟浜嗕竴涓垵濮嬪寲鍙橀噺錛岄偅涔堣鍙橀噺鐨勪綔鐢ㄥ煙鑼冨洿鏄粠寰幆寮濮嬪埌寰幆緇撴潫錛?/p>
2銆佸鏋滄兂鍦ㄥ驚鐜綋澶栭儴浣跨敤寰幆璁℃暟鍣ㄧ殑鏈緇堢粨鏋滐紝搴旇鍦ㄥ驚鐜紑濮嬪灝卞０鏄庛?/p>
3銆佸湪鍚岀駭鍒殑涓嶅悓for()寰幆涓紝鍙互瀹氫箟鐩稿悓鍚嶅瓧鐨勫彉閲忋?/p>
4銆佸湪琚寘鍚殑for()寰幆鍧楀唴涓嶅彲浠ュ畾涔夌浉鍚屽悕瀛楃殑鍙橀噺銆?/p>
5銆乫or()寰幆涓巜hile寰幆鏄畬鍏ㄧ瓑浠風(fēng)殑銆?/p>
涓夈侀楀彿榪愮畻絎?/span> 鍦↗ava涓楀彿榪愮畻絎︾殑鎯熶竴浣跨敤鍦烘墍灝辨槸for寰幆錛屽湪鍒濆鍖栧驚鐜彉閲忚〃杈懼紡鎴栭掑錛堥掑噺錛夎〃杈懼紡涓紝鎴戜滑鐢ㄤ竴緋誨垪閫楀彿鍒嗛殧涓嶅悓鐨勮鍙ワ紝榪欎簺璇彞鍧囧弬涓庡埌寰幆鎺у埗涓?/p>
涓嬮潰鐢ㄤ竴涓▼搴忚鏄庤繖涓棶棰?/p>
/*閫楀彿榪愮畻絎?/ public class CommaOperator { public static void main(String[] args) { for(int i = 1, j = i + 10; i < 5; i++, j = i * 3) { System.out.println(“i =” + i + “; j =” + j); } } } 杈撳嚭緇撴灉錛?/p>
i = 1; j = 11 i = 2; j = 6 i = 3; j = 9 i = 4; j = 12 閫氳繃榪欎釜紺轟緥錛岃鑰呭彲浠ュ彂鐜板垵濮嬪寲鍙橀噺鍦ㄥ紑濮嬬殑鏃跺欓兘鏄寜鐓у垵濮嬪寲琛ㄨ揪寮忚繘琛岀殑錛屽湪榪愮畻鐨勮繃紼嬩腑錛岄兘鎸夌収姝ラ暱鎺у埗琛ㄨ揪寮忚繘琛屻?/p>
鍥涖佹棤闄愬驚鐜?/span> 鎻愬埌鏃犻檺寰幆錛屼篃灝辨槸鎸囨病鏈夊垽鏂〃杈懼紡鐨刦or寰幆錛屽綋紼嬪簭榪涘叆鍒板驚鐜綋鍐呯殑鏃跺欙紝鐢變簬娌℃湁鍒ゆ柇琛ㄨ揪寮忔潵緇撴潫姝ｅ父鐨勫驚鐜紝浣垮緱紼嬪簭榪涘叆鍒版棤闄愬驚鐜腑錛屼篃灝辨槸鎴戜滑騫沖父璇寸殑姝誨驚鐜?/p>
鎴戜滑閫氳繃涓涓皬渚嬪瓙鏉ヤ簡瑙ｄ竴涓嬫棤闄愬驚鐜殑琛ㄧ幇褰㈠紡錛?/p>
/*鏃犻檺寰幆鎺у埗*/ public class Unlimited { public static void main(String[] args) { for(int i = 1;; i++) { System.out.println(“i =” + i); } } } 濡傛灉紼嬪簭榪涘叆鍒版棤闄愬驚鐜腑錛岀▼搴忓氨涓嶈兘姝ｅ父緇撴潫浜嗭紝鎴戜滑鍙湁鎵嬪姩緇撴潫紼嬪簭鐨勮繘紼嬨傛墜鍔ㄧ粨鏉熻繘紼嬬殑蹇嵎閿槸Ctrl+C銆?/p>
{
鐩殑1
}
else
{
鐩殑2
}
榪欏氨鏄潯浠惰鍙ョ殑鏍囧噯鍙ユ硶錛屾牴鎹笉鍚岀殑褰㈠紡鎴戜滑鍙互灝嗗畠鏀瑰彉涓轟笁縐嶅艦寮忥細
1錛塱f (…) 鍏惰〃杈懼紡涓猴細
if (鏉′歡)
鐩殑;
濡傛灉鐩殑涓嶆涓涓紝閭ｅ氨鍔犱笂涓瀵硅姳鎷彿錛屽氨鍙樻垚涓嬮潰鐨勮繖涓牱瀛愩?br> if 錛堢洰鐨勪笉姝竴涓級
{
鐩殑1;
鐩殑2;
鐩殑3;
}
涓嬮潰鎴戜滑緙栧啓涓涓▼搴忔潵榪愯涓涓嬶紝闂鏄細鍋囧榪欎釜鏈堟垜鐨勫伐璧勮秴榪?000鍏冿紝鎴戝氨璇鋒湅鍙嬪ぇ槨愪竴嬈★紝鍐嶅幓娓告吵錛屽啀鎵撲竴嬈＄數(shù)浜嗘父鎴忋?br>
/*鏉′歡璇彞絎竴縐嶅艦寮忕殑嫻嬭瘯*/
public class Suppose
{
public static void main(String[] args)
{
double mySales = 6000;
if (mySales > 5000)
{
System.out.println("璇鋒湅鍙嬪ぇ槨愪竴嬈?);
System.out.println("鍐嶅幓娓告吵");
System.out.println("鎵撶數(shù)瀛愭父鎴?);
}
}
}
杈撳嚭緇撴灉錛?br> 璇鋒湅鍙嬪ぇ槨愪竴嬈?br> 鍐嶅幓娓告吵
鎵撶數(shù)瀛愭父鎴?br> 鏈変簺浜哄彲鑳借闂細濡傛灉宸ヨ祫瓚呰繃浜?000鍏冿紝灝辮仛浼氾紝娓告吵錛屽鏋滄病鏈夌殑璇濓紝鍙兘鍚冩柟渚塊潰銆傝鎬庝箞琛ㄨ揪鍛紝鐜板湪鎴戜滑灝辮涓涓嬬浜岀褰㈠紡銆?br>
2錛塱f (…){…}else{…}
榪欑琛ㄧ幇褰㈠紡鍙兘鏄渶鐔熸?zhèn)夊Q屼篃鏄渶甯哥敤鐨勶紝瀹冩墍琛ㄨ揪鐨勬剰鎬濆氨鏄細濡傛灉鏉′歡婊¤凍錛屽氨鎵цif (…)鍚庨潰鐨剓…}錛屽鏋滄潯浠朵笉婊¤凍錛屽氨鎵цelse鍚庨潰鐨剓…}鍐呭銆備緥濡傦細鍋囧榪欎釜鏈堟垜鐨勫伐璧勮秴榪?000鍏冿紝鎴戝氨璇鋒湅鍙嬪ぇ槨愪竴嬈★紝鍐嶅幓娓告吵錛屽啀鎵撲竴嬈＄數(shù)瀛愭父鎴忋傚鏋滀笉鍒?000鍏冿紝鎴戝彧鏈夊悆鏂逛究闈簡銆?br>
/*鏉′歡璇彞絎簩縐嶅艦寮忔祴璇?/
public class Suppose2
{
public static void main(String[] args)
{
double mySales = 4000;
if ( mySales > 5000)
{
System.out.println("璇鋒湅鍙嬪ぇ槨愪竴嬈?);
System.out.println("鍐嶅幓娓告吵");
System.out.println("鎵撶數(shù)瀛愭父鎴?);
}
else
{
System.out.println("鍙湁鍚冩柟渚塊潰浜?);
}
}
}
杈撳嚭緇撴灉錛氬彧鏈夊悆鏂逛究闈簡
鐜板湪鎴戜滑澶勭悊鐨勪袱縐嶅艦寮忛兘鏄竴涓潯浠訛紝閭ｄ箞鑳戒笉鑳藉鐞嗗涓潯浠跺憿錛屼笅闈㈠氨寮濮嬪涔犵涓夌褰㈠紡銆?br>
3錛塱f …else if … 鍏惰〃杈懼紡涓猴細
if (鏉′歡涓)
{
鐩殑涓;
……
}
else if (鏉′歡浜?
{
鐩殑涓;
……
}
else if (鏉′歡涓?
{
鐩殑涓;
……
}
……
else
{
涓嶆弧瓚充換浣曟潯浠剁殑緇撴灉;
}
鐜板湪鎴戜滑鎶婁笂闈㈢殑琛ㄧ幇褰㈠紡鏇存敼涓涓嬶細
if (鏉′歡涓)
{
鐩殑涓;
……
}
else
{
if (鏉′歡浜?
{
鐩殑涓;
……
}
else
{
if(鏉′歡涓?
{
鐩殑涓;
……
}
……
else
{
涓嶆弧瓚充換浣曟潯浠剁殑緇撴灉;
}
}
}
鎴戜滑鍙互鐪嬪嚭錛岃繖涓ゆ鐨勯昏緫瀹屽叏鏄竴鑷寸殑銆傛湁鐨勫闀夸負浜嗛紦鍔卞瀛愬涔狅紝鐗瑰埆鍒跺畾浜嗗涓嬬殑濂栧姳鎺柦錛氬鏋滆繖瀛︽湡鑰冭瘯姣忛棬閮?00銆備綘鎯充笂鍝帺閮借錛屽彟澶栧啀濂栧姳500鍏冮浂鐢ㄩ挶錛涘鏋滆兘杈懼埌90鍒嗕互涓婏紝鍙鍔?00鍏冮挶錛?0鍒嗕互涓婏紝鍙湁300鍏冿紝浣庝簬80鍒嗭紝瀵逛笉璧蜂簡錛屼綘鏆戝亣灝辮佽佸疄瀹炲湪瀹跺涔狅紝鍝篃涓嶈兘鍘匯傛垜浠敤涓孌電▼搴忔潵瀹炵幇榪欎釜榪囩▼鍚э細
if (姣忛棬鎴愮嘩 = 100)
{
鍙互涓婁換浣曞湴鏂圭帺;
500鍏冨閲?
}
else if (鎴愮嘩 >= 90)
{
鍙鍔?00鍏?
}
{
鍙鍔?00鍏?
}
else
{
鑰佽佸疄瀹炲湪瀹跺涔?
}
鎴戜滑鍐嶇湅涓涓皬紼嬪簭錛?br> /*else鍧楃殑閭昏繎灞炴?/
public class ConditionTest
{
public static void main(String[] args)
{
int salary = 5000;
if (salary > 5000)
System.out.println("the first condition my salary is:" + salary);
if (salary > 4500)
System.out.println("the second comdition my salary is:" + salary);
else
System.out.println("the else my salary is:" + salary);
}
}
杈撳嚭緇撴灉錛歵he second comdition my salary is錛?000
鍙互鐪嬪埌錛岀▼搴忓茍娌℃湁鐩存帴鎶ュ憡else鍧楋紝鑰屾槸榪涘叆絎簩涓潯浠跺潡錛岃繖灝辨槸鏉′歡璇彞鐨勪竴涓噸瑕佺壒鎬э細
1錛塭lse鍧楁槸鍙夌殑錛?br> 2錛塭lse鍧楁繪槸灞炰簬紱誨畠鏈榪戠殑if鍧椼?
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