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测试代码高亮

class WaterSource{
    private String s;
    WaterSource(){
        System.out.println("WaterSource()");
        s = "constructed";
    }
    public String toString(){
        return s;
    }
}
public class SprinklerSystem {
    private String name = "Alex";//Initializing at point of definition
    private String sex;
    private WaterSource wSource;
    private double d;
    public  SprinklerSystem(){
        System.out.println("In Sprinkler");
        d = 1.0;    //Initailizing in the constructor of class
        wSource = new WaterSource();
    }
    public String toString(){
        if (sex == null) { sex = "male"; }//Delayed initialization
        return 
            "string" + "=" + name + " " +
            "sex" + "=" + sex + " " +
            "double" + "=" + d + " " +
            "WaterSource" + "=" + wSource;
    }
    
    public static void main(String[] args){
        SprinklerSystem sprinklers = new SprinklerSystem();
        System.out.println(sprinklers);
    }
}