Replace character in a sentence in java

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COMPLETE SOURCE CODE FOR : ReplaceCharacterInASentence.java
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public class ReplaceCharacterInASentence
{
public static void main(String[]args)
{
String a="Hellooo Woooorld";

//REPLACE ALL CHARACTER o WITH a
String b=a.replace('o','a');
System.out.println(b);



//REPLACE A CHARACTER
//REPLACE LAST o IN Hellooo WITH a

//IF YOU WANT TO REPLACE A CHARACTER, YOU MUST TAKE WORD
//THAT CONTAIN THE CHARACTER AND MAKE SURE
//THE WORD IS ONLY UNIQUE THAT CAN REPRESENT WORD
//CONTAIN THE CHARACTER
//This is why we take looo instead of ooo because
//ooo also exist in Woooorld
String c=a.replace("looo","looa");
System.out.println(c);
}
}


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JUST COMPILE AND EXECUTE IT
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