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Comparing Two Strings

public class MainClass {   public static void main(String[] args) {     String s1 = "Java";     String s2 = "Java";     if (s1.equals(s2)) {       System.out.println("==");     }   } } Sometimes you see this style. if ("Java".equals (s1)) In the following code, if s1 is null, the if statement will return false without evaluating the second expression. if (s1 != null && s1.equals("Java"))