Fireworks.java:7: isRunning() in Fireworks cannot implement isRunning() in Monit oredRunnable; attempting to assign weaker access privileges; was public boolean isRunning(){ ^ Fireworks.java:4: run() in Fireworks cannot implement run() in java.lang.Runnabl e; attempting to assign weaker access privileges; was public void run(){ ^ Fireworks.java:5: cannot resolve symbol symbol : method shootFireWorks () location: class Fireworks shootFireWorks(); ^ 3 errors
所以要写成:boolean isRunning();
private boolean running;
void run(){
shootFireWorks();
}
boolean isRunning(){
return (running);
}
}??
oredRunnable; attempting to assign weaker access privileges; was public
boolean isRunning(){
^
Fireworks.java:4: run() in Fireworks cannot implement run() in java.lang.Runnabl
e; attempting to assign weaker access privileges; was public
void run(){
^
Fireworks.java:5: cannot resolve symbol
symbol : method shootFireWorks ()
location: class Fireworks
shootFireWorks();
^
3 errors
package interface1;interface MonitoredRunnable extends java.lang.Runnable {
boolean isRunning();
}public class Fireworks implements MonitoredRunnable {
private boolean running; public void run(){
//shootFireWorks();
}
public boolean isRunning(){
return (running);
}
}
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解释:
boolean isRunning();
//接口中的方法只有定义没有实现细节,并且全部为public,尽管可以不用public修饰。
-------------
public void run(){
//shootFireWorks();
}
public boolean isRunning(){
return (running);
}
//实现接口的类必须在类中给出接口中所有方法的定义,因为接口中的方法public,所以,必须在实现方法时加上public关键字。
//因为接口中的方法默认的是public,而你在实现这个接口时方法用的是省缺的(default),所以出错.
--------------
shootFireWorks();你把这个函数加上就没事了。