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Commit22c8dd1

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add a solution for 151
1 parent0b55353 commit22c8dd1

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2 files changed

+51
-1
lines changed

2 files changed

+51
-1
lines changed

‎src/main/java/com/fishercoder/solutions/_151.java

Lines changed: 41 additions & 1 deletion
Original file line numberDiff line numberDiff line change
@@ -24,7 +24,7 @@ public String reverseWords(String s) {
2424
while (!stack.isEmpty()) {
2525
stringBuilder.append(stack.pollLast()).append(" ");
2626
}
27-
returnstringBuilder.substring(0,stringBuilder.length() -1).toString();
27+
returnstringBuilder.substring(0,stringBuilder.length() -1);
2828
}
2929
}
3030

@@ -61,4 +61,44 @@ public String reverseWords(String s) {
6161
returnresult;
6262
}
6363
}
64+
65+
publicstaticclassSolution3 {
66+
publicStringreverseWords(Strings) {
67+
s =s.trim();
68+
StringBuildersb =newStringBuilder();
69+
for (inti =0;i <s.length();i++) {
70+
if (s.charAt(i) ==' ' &&sb.length() >0 &&sb.charAt(sb.length() -1) ==' ') {
71+
continue;
72+
}else {
73+
sb.append(s.charAt(i));
74+
}
75+
}
76+
intleft =0;
77+
intright =sb.length() -1;
78+
while (left <right) {
79+
chartmp =sb.charAt(left);
80+
sb.setCharAt(left,sb.charAt(right));
81+
sb.setCharAt(right,tmp);
82+
left++;
83+
right--;
84+
}
85+
intboundary =0;
86+
while (boundary <sb.length()) {
87+
left =boundary;
88+
while (boundary <sb.length() &&sb.charAt(boundary) !=' ') {
89+
boundary++;
90+
}
91+
right =boundary -1;
92+
while (left <right) {
93+
chartmp =sb.charAt(left);
94+
sb.setCharAt(left,sb.charAt(right));
95+
sb.setCharAt(right,tmp);
96+
left++;
97+
right--;
98+
}
99+
boundary++;
100+
}
101+
returnsb.toString();
102+
}
103+
}
64104
}

‎src/test/java/com/fishercoder/_151Test.java

Lines changed: 10 additions & 0 deletions
Original file line numberDiff line numberDiff line change
@@ -9,12 +9,14 @@
99
publicclass_151Test {
1010
privatestatic_151.Solution1solution1;
1111
privatestatic_151.Solution2solution2;
12+
privatestatic_151.Solution3solution3;
1213
privatestaticStrings;
1314

1415
@BeforeClass
1516
publicstaticvoidsetup() {
1617
solution1 =new_151.Solution1();
1718
solution2 =new_151.Solution2();
19+
solution3 =new_151.Solution3();
1820
}
1921

2022
@Test
@@ -45,5 +47,13 @@ public void test4() {
4547
publicvoidtest5() {
4648
s =" hello world ";
4749
assertEquals("world hello",solution2.reverseWords(s));
50+
assertEquals("world hello",solution3.reverseWords(s));
51+
}
52+
53+
@Test
54+
publicvoidtest6() {
55+
s ="Bob Loves Alice ";
56+
assertEquals("Alice Loves Bob",solution2.reverseWords(s));
57+
assertEquals("Alice Loves Bob",solution3.reverseWords(s));
4858
}
4959
}

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