将命名参数传递给方法
Pass named parameter to a method
代码:
class AllTheColorsOfTheRainbow {
private int hue = 0;
int anIntegerRepresentingColors;
void changeTheHueOfTheColor(int newHue) {
this.hue = newHue;
}
public int getHue(){
return this.hue;
}
}
public class Ex11 {
public static void main(String [] args){
AllTheColorsOfTheRainbow a = new AllTheColorsOfTheRainbow();
a.changeTheHueOfTheColor(newHue = 1);
System.out.println(a.getHue());
}
}
堆栈跟踪:
javac Ex11.java
Ex11.java:18: error: cannot find symbol
a.changeTheHueOfTheColor(newHue = 1);
^
symbol: variable newHue
location: class Ex11
1 error
这是什么意思,我该如何更正它?
Java 没有命名参数,只有位置参数。您需要在没有参数名称的情况下传递它:
a.changeTheHueOfTheColor(1);
// Here -----------------^
代码:
class AllTheColorsOfTheRainbow {
private int hue = 0;
int anIntegerRepresentingColors;
void changeTheHueOfTheColor(int newHue) {
this.hue = newHue;
}
public int getHue(){
return this.hue;
}
}
public class Ex11 {
public static void main(String [] args){
AllTheColorsOfTheRainbow a = new AllTheColorsOfTheRainbow();
a.changeTheHueOfTheColor(newHue = 1);
System.out.println(a.getHue());
}
}
堆栈跟踪:
javac Ex11.java
Ex11.java:18: error: cannot find symbol
a.changeTheHueOfTheColor(newHue = 1);
^
symbol: variable newHue
location: class Ex11
1 error
这是什么意思,我该如何更正它?
Java 没有命名参数,只有位置参数。您需要在没有参数名称的情况下传递它:
a.changeTheHueOfTheColor(1);
// Here -----------------^