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import com.yale.test.run.RunntimeTest;

public class Test {

public static void main(String[] args) {

System.out.println(System.getProperty("user.dir"));

String str = "abc";

Test.isSame(str);

Test.testStr(str);;

System.out.println(str);

}

public static void isSame(String str){

String strSec = "abc";

if (strSec == str) {

System.out.println(true);

} else {

System.out.println(false);

}

public static void testStr (String str) {

str += "追加";

System.out.println(str);

}