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public interface ICallback {
public void func();
}
public class ClassWithCallbackFunction implements ICallback{
public ClassWithCallbackFunction() {
}
public void func(){
System.out.println("cccccccccccccccccc");
}
}
public class Caller {
ICallback callback;
public void doCallback() {
callback.func();
}
public void setCallback(ICallback callback) {
this.callback = callback;
}
}
public class MainClass {
public MainClass() {
}
public static void main(String[] args) {
Caller caller = new Caller();
caller.setCallback(new ClassWithCallbackFunction() {
public void func() {
System.out.println("aaaaaaaaaa");
}
});
caller.doCallback(); //????????????? why not print
}
}
//我的机器能打印aaaaaaaaaa,你的机器神马牌子的,高级不愿意打印它们
interface ICallback {
public void func();
}
class ClassWithCallbackFunction implements ICallback {
public ClassWithCallbackFunction() {
}
public void func() {
System.out.println("cccccccccccccccccc");//实现接口方法
}
}
class Caller {
ICallback callback;
public void doCallback() {
callback.func();
}
public void setCallback(ICallback callback) {
this.callback = callback;
}
}
public class MainClass {
public MainClass() {
}
public static void main(String[] args) {
Caller caller = new Caller();
caller.setCallback(new ClassWithCallbackFunction() {
public void func() {//这里已经重写了func方法,你不重写这个它,它就会打印"cccccccccccccccccc"
System.out.println("aaaaaaaaaa");
}
});
caller.doCallback(); // ????????????? why not print
}
}
/*output:
aaaaaaaaaa
*/