ADDITIONAL SYSTEM INFORMATION :
java version "1.8.0_102"
Java(TM) SE Runtime Environment (build 1.8.0_102-b14)
Java HotSpot(TM) 64-Bit Server VM (build 25.102-b14, mixed mode)

A DESCRIPTION OF THE PROBLEM :
@Test
    public void test015(){
        String s3 = new String("4") + new String("9");
        s3 = s3.intern();
        String s4 = "49";
        System.out.println(s3 == s4); // 10,true
    }

    @Test
    public void test016(){
        String s3 = new String("3") + new String("9");
        s3 = s3.intern();
        String s4 = "39";
        System.out.println(s3 == s4); // 11,false
    }

STEPS TO FOLLOW TO REPRODUCE THE PROBLEM :
@Test
    public void test015(){
        String s3 = new String("4") + new String("9");
        s3 = s3.intern();
        String s4 = "49";
        System.out.println(s3 == s4); // 10,true
    }

    @Test
    public void test016(){
        String s3 = new String("3") + new String("9");
        s3 = s3.intern();
        String s4 = "39";
        System.out.println(s3 == s4); // 11,false
    }

EXPECTED VERSUS ACTUAL BEHAVIOR :
EXPECTED -
all true
ACTUAL -
one false
on true

---------- BEGIN SOURCE ----------
@Test
    public void test015(){
        String s3 = new String("4") + new String("9");
        s3 = s3.intern();
        String s4 = "49";
        System.out.println(s3 == s4); // 10,true
    }

    @Test
    public void test016(){
        String s3 = new String("3") + new String("9");
        s3 = s3.intern();
        String s4 = "39";
        System.out.println(s3 == s4); // 11,false
    }
---------- END SOURCE ----------

FREQUENCY : always