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Merged
yanglbme merged 2 commits into from
Dec 24, 2018
Merged

Update Palindrome.java #665

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a5bf69f
Update Palindrome.java
tong72 Dec 23, 2018
2d383bf
Update Palindrome.java
yanglbme Dec 24, 2018
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43 changes: 20 additions & 23 deletions Others/Palindrome.java
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Original file line number Diff line number Diff line change
@@ -1,26 +1,23 @@
class Palindrome {

private String reverseString(String x){ //*helper method
String output = "";
for(int i=x.length()-1; i>=0; i--){
output += x.charAt(i); //addition of chars create String
}
return output;
}


public Boolean FirstWay(String x){ //*palindrome method, returns true if palindrome
return (x.equalsIgnoreCase(reverseString(x)));
}

public boolean SecondWay(String x)
{
if (x.length() == 0 || x.length() == 1)
return true;

if (x.charAt(0) != x.charAt(x.length() - 1))
return false;
private String reverseString(String x) { // *helper method
StringBuilder output = new StringBuilder(x);
return output.reverse().toString();
}

return SecondWay(x.substring(1 , x.length() - 1));
}
}
public boolean FirstWay(String x) { // *palindrome method, returns true if palindrome
if (x == null || x.length() <= 1)
return true;
return x.equalsIgnoreCase(reverseString(x));
}

public boolean SecondWay(String x) {
if (x.length() == 0 || x.length() == 1)
return true;

if (x.charAt(0) != x.charAt(x.length() - 1))
return false;

return SecondWay(x.substring(1, x.length() - 1));
}
}