OnJava8-Examples/validating/Inverter2.java at master · CSapprenticeWT/OnJava8-Examples · GitHub

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// validating/Inverter2.java

// We make no guarantees that this code is fit for any purpose.

// Visit http://OnJava8.com for more book information.

package validating;

import static java.lang.Character.*;

public class Inverter2 implements StringInverter {

@Override public String invert(String str) {

String result = "";

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

char c = str.charAt(i);

result += isUpperCase(c) ?

toLowerCase(c) :

toUpperCase(c);

}

return result;

}