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class文件命名问题

摘要: class文件命名问题

class WaterSource {
private String s;
WaterSource() {
System.out.println("WaterSource()");
s = new String("Constructed");
}
public String toString() { return s; }
}

public class SprinklerSystem {
private String valve1, valve2, valve3, valve4;
WaterSource source;
int i;
float f;
void print() {
System.out.println("valve1 = " + valve1);
System.out.println("valve2 = " + valve2);
System.out.println("valve3 = " + valve3);
System.out.println("valve4 = " + valve4);
System.out.println("i = " + i);
System.out.println("f = " + f);
System.out.println("source = " + source);
}
public static void main(String[] args) {
SprinklerSystem x = new SprinklerSystem();
x.print();
}
} ///:~

这段代码中.我保存的文件名是用SprinklerSystem.java可是出了一个错误:C:/新建文件名/SprinklerSystem.java:9: 'class' or 'interface' expected
public WaterSouce{

换成waterSouce.java也出错

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没错
valve1 = null
valve2 = null
valve3 = null
valve4 = null
i = 0
f = 0.0
source = null

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一个文件只写一个公共类,文件名应该和此公共类名一致,其他的类可以写成此类的内部类

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