继承中的构造方法的问题

但是下列代码并未报错，不明白为什么

public class SuperTest {private int i;/*SuperTest(){System.out.println("调用无参SuperTest");}SuperTest(int i){this.i=i;System.out.println("调用有参SuperTest");}*/public static void main(String args[]){SubTest T = new SubTest(9);}}class SubTest extends SuperTest{SubTest(){System.out.println("调用无参SubTest");}SubTest(int i){//super(1);System.out.println("调用有参SubTest");}}