7 种将字符串反转的 Java 方法

01

import

java.util.Stack;

02

public

class

StringReverse{

03

04

public

static

Stringreverse1(Strings){

05

int

length=s.length();

06

if

(length<=

1

)

07

return

s;

08

Stringleft=s.substring(

0

,length/

2

);

09

Stringright=s.substring(length/

2

,length);

10

return

reverse1(right)+reverse1(left);

11

}

12

13

public

static

Stringreverse2(Strings){

14

int

length=s.length();

15

Stringreverse=

""

;

16

for

(

int

i=

0

;i<length;i++)

17

reverse=s.charAt(i)+reverse;

18

return

reverse;

19

}

20

21

public

static

Stringreverse3(Strings){

22

char

[]array=s.toCharArray();

23

Stringreverse=

""

;

24

for

(

int

i=array.length-

1

;i>=

0

;i--)

25

reverse+=array[i];

26

27

return

reverse;

28

}

29

30

public

static

Stringreverse4(Strings){

31

return

new

StringBuffer(s).reverse().toString();

32

}

33

34

public

static

Stringreverse5(Stringorig){

35

char

[]s=orig.toCharArray();

36

int

n=s.length-

1

;

37

int

halfLength=n/

2

;

38

for

(

int

i=

0

;i<=halfLength;i++){

39

char

temp=s[i];

40

s[i]=s[n-i];

41

s[n-i]=temp;

42

}

43

return

new

String(s);

44

}

45

46

public

static

Stringreverse6(Strings){

47

48

char

[]str=s.toCharArray();

49

50

int

begin=

0

;

51

int

end=s.length()-

1

;

52

53

while

(begin<end){

54

str[begin]=(

char

)(str[begin]^str[end]);

55

str[end]=(

char

)(str[begin]^str[end]);

56

str[begin]=(

char

)(str[end]^str[begin]);

57

begin++;

58

end--;

59

}

60

61

return

new

String(str);

62

}

63

64

public

static

Stringreverse7(Strings){

65

char

[]str=s.toCharArray();

66

Stack<Character>stack=

new

Stack<Character>();

67

for

(

int

i=

0

;i<str.length;i++)

68

stack.push(str[i]);

69

70

Stringreversed=

""

;

71

for

(

int

i=

0

;i<str.length;i++)

72

reversed+=stack.pop();

73

74

return

reversed;

75

}

76

77

}