Java-接口练习
Java-接口练习
编写2个接口:InterfaceA和InterfaceB;在接口InterfaceA中有个方法voidprintCapitalLetter();在接口InterfaceB中有个方法void printLowercaseLetter();然
后写一个类Print实现接口InterfaceA和InterfaceB,要求printCapitalLetter()方法实现输出大写英文字母表的功能,printLowercaseLetter()方法实现输出小写英文字母表的功能。再写一个主类E,在主类E的main方法中创建Print的对象并赋值给InterfaceA的变量a,对象a调用printCapitalLetter方法;最后再在主类E的main方法中创建Print的对象并赋值给InterfaceB的变量b,对象b调用printLowercaseLetter方法。
接口1
package com.jiekoulianxi; public interface InterfaceA { //抽象方法 void printCapitalLetter(); }
接口2
package com.jiekoulianxi; public interface InterfaceB { void printLowercaseLetter(); }
实现类;
package com.jiekoulianxi; public class Print implements InterfaceA, InterfaceB { @Override public void printLowercaseLetter() { System.out.println("abcdefghijklmnopqistuvwxyz"); } @Override public void printCapitalLetter() { System.out.println("ASCDEFGHIJKLMNOPQRSTUVWXYZ"); } }
测试:
package com.jiekoulianxi; public class Main { public static void main(String[] args) { InterfaceA a=new Print(); InterfaceB b=new Print(); b.printLowercaseLetter(); a.printCapitalLetter(); } }