有两个类Super1和Sub1Super1.classpublicclassSuper1{Super1(){this.printThree();}publicvoidprintThree(){System.out.println("PrintThree");}}Sub1.classpublicclassSub1extendsSuper1{Sub1(){super.printThree();}intthree=(int)Math.PI;publicvoidprintThree(){System.out.println(three);}publicstaticvoidmain(String