Java 复习题样.docVIP

二、读程序题，写出程序的执行结果（每小题4分，共16分） 1 public class A { static void prt(char c){ System.out.print(char+ ); } static void prt(int i){ System.out.print(int+ ); } static void prt(float f){ System.out.print(float+ ); } public static void main(String[] args) { prt(‘c’); int f=5; prt(f); } } 2. class Parent { void f(){ System.out.print(In Parent); } } class Child1 extends Parent { void f(){ System.out.print(In Child1;); } } class Child2 extends Parent { } class Test{ public static void main(String args[]){ Parent p=new Child1(); p.f(); p=new Child2(); p.f(); } } 3. class Parent { String s=Parent; void prnt(){ System.out.print(s +;); } } class Child extends Parent { String s=Child; void prnt(){ System.out.print(s +;); } } class Test{ public static void main(String args[]){ Parent a= new Parent(); a.prnt(); Parent c=new Child(); c.prnt(); } } 4. class Parent{ public Parent(){ this(1); System.out.print(Parent中的无参构造方法+;); } public Parent(int i){ System.out.print(Parent中的有参构造方法+;); } } class Child extends Parent{ public Child(){ this(1); System.out.print(Child中的无参构造方法+;); } public Child(int i){ super(); System.out.print(Child中的有参构造方法+;); } } class Test{ public static void main(String args[]){ new Child(); } } 二、读程序题，写出程序的执行结果（每小题4分，共16分。答案直接写在空白处。） public class TestReLoad { public static int jueDuiZhi(int a){ System.out.println(jueDuiZhi(int)); return a0?a:-a; } public static double jueDuiZhi(double a){ System.out.println(jueDuiZhi(double)); return a0?a:-a; } public static float jueDuiZhi(float a){ System.out.println(jueDuiZhi(float)); return a0?a:-a; } public static void main(String[] args) { jueDuiZhi(1); jueDuiZhi(5.0); } } 2. class Father{ public Father(){ System.out.println(Father构造方法); } } class Son extends Father{ public Son(){ System.out.println(Son构造方法); } public static void main(String args[]){ new Son(); } } 3. interface HisInterface{ publi