1
閫夋嫨璇彞
+
寰幆璇彞浣滀笟
涓�銆?/p>
濉┖棰?/p>
1.
Java
涓湁涓ょ绫诲瀷鐨勯�夋嫨缁撴瀯鐨勬帶鍒惰鍙ワ紝鍒嗗埆鏄?/p>
if
璇彞鍜?/p>
switch
銆?/p>
2.
鍦?/p>
Java JDK1.7
涔嬪墠锛?/p>
switch
鍙兘鏀寔
byte
銆?/p>
short
銆?/p>
char
銆?/p>
int
鎴栬�呭叾瀵瑰簲鐨勫皝瑁呯被
浠ュ強
Enum
绫诲瀷銆傚湪
JDK1.7
涓張鍔犲叆浜?/p>
long
绫诲瀷銆?/p>
3.
for
寰幆鐨勮娉曟牸寮忔槸
for (
琛ㄨ揪寮?/p>
1;
琛ㄨ揪寮?/p>
2;
琛ㄨ揪寮?/p>
3) {
寰幆浣?/p>
}
锛屽叾涓湪鏁翠釜寰幆
杩囩▼涓彧鎵ц涓�娆＄殑閮ㄥ垎鏄〃杈惧紡
1
銆?/p>
4.
鍦ㄥ惊鐜粨鏋勪腑锛屽鏋滄兂璺冲嚭寰幆浣擄紝缁撴潫鏁翠釜寰幆缁撴瀯鍙互浣跨敤
continue
璇彞銆?/p>
5.
____break_________
璇彞鐢ㄥ湪寰幆璇彞浣撲腑锛岀敤浜庣粓姝㈡煇娆″惊鐜繃绋嬶紝鍗宠烦杩囧惊鐜?
浣撲腑灏氭湭鎵ц鐨勮鍙ワ紝鎺ョ潃杩涜涓嬩竴娆℃槸鍚︽墽琛屽惊鐜殑鍒ゅ畾銆傚嵆鍙粨鏉熸湰娆″惊鐜紝
鑰屼笉鏄粓姝㈡暣涓惊鐜殑鎵ц銆?/p>
6.
浣跨敤
Math.random( )
杩斿洖甯︽鍙风殑
double
鍊硷紝
璇ュ�煎ぇ浜庣瓑浜?/p>
0.0
涓斿皬浜?/p>
1.0
銆?/p>
浣跨敤
璇?/p>
鍑?/p>
鏁?/p>
鐢?/p>
鎴?/p>
[30,60]
涔?/p>
闂?/p>
鐨?/p>
闅?/p>
鏈?/p>
鏁?/p>
鏁?/p>
鐨?/p>
璇?/p>
鍙?/p>
鏄?/p>
double
num=(double)(n*Math.random)
銆?/p>
浜屻�?/p>
閫夋嫨棰?/p>
1.
浠ヤ笅浠ｇ爜鐨勬墽琛岀粨鏋滄槸锛?/p>
a
锛?/p>
銆?/p>
锛堥�夋嫨涓�椤癸級
boolean
m =
false
;
if
(m =
false
){
System.
out
.println("false");
}
else
{
System.
out
.println("true");
}
A.
false
B.
true
C.
缂栬瘧閿欒
D.
鏃犵粨鏋?/p>
2.
鍒嗘瀽濡備笅
Java
浠ｇ爜锛岀紪璇戣繍琛岀殑杈撳嚭缁撴灉鏄紙
d
锛?/p>
銆?/p>
锛堥�夋嫨涓�椤癸級
publicstaticvoid
main(String[ ] args) {
boolean
a=
true
;
boolean
b=
false
;
if
(!(a&&b)) {
System.
out.
print("!(a&&b)");
}
elseif
(!(a||b)) {
System.
out
.println("!(a||b)");
}
else
{
System.
out
.println("ab");
}
}
A
!(a&&b)