父類
package?com.imooc;

public?class?traffic?{
	int?planeSpeed;
	int?planeAccount;
	
	
	

	public?int?getPlaneSpeed()?{
		return?planeSpeed;
	}

	public?void?setPlaneSpeed(int?planeSpeed)?{
		this.planeSpeed?=?planeSpeed;
	}

	public?int?getPlaneAccount()?{
		return?planeAccount;
	}

	public?void?setPlaneAccount(int?planeAccount)?{
		this.planeAccount?=?planeAccount;
	}

public?void?show(){
		
		this.setPlaneAccount(planeAccount=100);
		this.setPlaneSpeed(planeSpeed=1000);
		
		System.out.println("飛機的速度"+planeSpeed);
		
		System.out.println("飛機的載客數量"+planeAccount);

	}

}

package?com.imooc;

public?class?testing?{

	/**
	?*?@param?args
	?*/
	public?static?void?main(String[]?args)?{
		//?TODO?Auto-generated?method?stub
		traffic?run1=new?traffic();
		
		
		run1.show();
		
		
		
		
	}

}

子類我不知道怎么用到，為什么show方法放到子類里，測試程序就無法調用show方法