java 错误提示小问题

这个是我写的java程序，有2个报错，但是不知道该怎么解决~~
请大家帮忙看下~~谢谢

interface ComputerWeight
{
public double ComputerWeight();
}

class Television implements ComputerWeight
{
public void ComputerWeight(double weight)
{
this.weight=weight;
}
}

class Computer implements ComputerWeight
{
public void ComputerWeight(double weight)
{
this.weight=weight;
}
}

class WashMachine implements ComputerWeight
{
public void ComputerWeight(double weight)
{
this.weight=weight;
}
}

class Car
{
ComputerWeight[] goods;
double totalWeights=0;
Car(ComputerWeight[] goods)
{
this.goods=goods;
}
public double getTotalWeights()
{
totalWeights=0;
for(ComputerWeight item:goods)
{
totalWeights=totalWeights+item.ComputerWeight();
}
return totalWeights;
}
}<

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