Java泛型之泛型接口

zds420

package com.study.generics;import com.study.generics.GenericsImpl;public class GenericsImplClass01 {public static void main(String []args) {//父类引用指向子类对象GenericsImpl<String> generics= new GenericsImplDemo<String>();generics.setVar("设置父类引用指向子类对象");System.out.println(generics.getVar());GenericsImpl<String> generics1= new GenericsImplDemo<String>("泛型接口对参数的构造方法");System.out.println(generics1.getVar());GenericsImpl<String> generics2=new GenericsImplBase("接口泛型，类未声明泛型类");System.out.println(generics2.getVar()); }}class GenericsImplDemo<T> implements GenericsImpl<T>{public static String VARIABLE="1";private String var;public GenericsImplDemo() {}public GenericsImplDemo(String variable) {this.setVar(variable);}  public String getVar() {return var;}public void setVar(String var) {this.var = var;}}//此类接口声明了String的参数类型class GenericsImplBase implements GenericsImpl<String>{public static String VARIABLE="1";private String var;public GenericsImplBase() {}public GenericsImplBase(String variable) {this.setVar(variable);}  public String getVar() {return var;}public void setVar(String var) {this.var = var;}}  
package com.study.generics;public interface GenericsImpl<T> {//泛型接口，T为泛型的参数类型//接口中定义属性，抽象方法。public static String VARIABLE="1";public void setVar(String var) ;public String getVar();}