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package test_03;
public class StringTest {
public static void main(String[] args) {
String s1="abc";
String s2=s1;
System.out.println(s1==s2);
s1+="d";
System.out.println(s1==s2);
StringBuffer sb1=new StringBuffer("abc");
StringBuffer sb2=sb1;
System.out.println(sb1==sb2);
sb1.append("d");
System.out.println(sb1==sb2);
}
}