java - 我们可以将传递参数的方法存储在java变量中吗

Question

如何将带有参数的 displayPriceMessage 方法存储在变量中

//method of displayPriceMethod
 public void displayPriceMessage(String name, String msg, boolean cream, boolean coke)
{
        priceamoutntxt.setText("\n Name: "+Ename.getText().toString()+"\n total : "+priceamoutntxt.getText()+"\n Add Ice-Cream ?"+ cream +"\n Add Coca-Cola ?"+coke+"\n than you ");
}

//  displayPriceMessage argumetnt
displayPriceMessage("ename","",isIceCream, cocaCola);

Answer 1

您可以在 FP 中执行此操作。也许您需要一个自定义功能接口(interface)。

DisplayPriceMessage displayPriceMessage =  this::displayPriceMessage;

public void displayPriceMessage(String name, String msg, boolean cream, boolean coke)
{
    priceamoutntxt.setText("\n Name: "+Ename.getText().toString()+"\n total : "+priceamoutntxt.getText()+"\n Add Ice-Cream ?"+ cream +"\n Add Coca-Cola ?"+coke+"\n than you ");
}

创建一个具有与displayPriceMessage类似签名的抽象方法的功能接口(interface)

@FunctionalInterface
interface DisplayPriceMessage {
    void displayPriceMessage(String name, String msg, boolean cream, boolean coke);
}