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Challenge 32.

String and immutability.

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	`1`	`+package challenge31_40;`
	`2`	`+`
	`3`	`+/**`
	`4`	`+ * unlike StringBuilder, String are immutable.`
	`5`	`+ */`
	`6`	`+public class Challenge_32 {`
	`7`	`+ public static void main( String[] args ) {`
	`8`	`+ var jedi = "masterYoda";`
	`9`	`+ changeString(jedi);`
	`10`	`+ System.out.println(jedi);`
	`11`	`+ }`
	`12`	`+`
	`13`	`+ private static String changeString( String word ) {`
	`14`	`+ word.replace(word, "newMasterYoda");`
	`15`	`+ return word;`
	`16`	`+ }`
	`17`	`+}`

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