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709_To_Lower_Case.java

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class Solution {

public String toLowerCase(String str) {

return str.toLowerCase();

}

/*public String toLowerCase(String str) {

char[] a = str.toCharArray();

for (int i = 0; i < a.length; i++)

if ('A' <= a[i] && a[i] <= 'Z')

a[i] = (char) (a[i] - 'A' + 'a');

return new String(a);

}*/

}