问为什么Sysout.out.println错误？

package dayinjishixian;

import dayinji.Iintbox;
import dayinji.Ipapersize;

public class Printer {
    private Iintbox intbox = null;
    private Ipapersize papersize = null;

    public void print1(String neirong) {
        if (intbox == null || papersize == null)
            System.out.println("缺少纸张，墨盒");
        return;
    }
    String color=intbox.getcolor();
    String size=papersize.getsize();
    System.out.println();//这里eclipse报错
    sysout//按Alt+/不能出现
    public Iintbox getIntbox() {
        return intbox;
    }

    public void setIntbox(Iintbox intbox) {
        this.intbox = intbox;
    }

    public Ipapersize getPapersize() {
        return papersize;
    }

    public void setPapersize(Ipapersize papersize) {
        this.papersize = papersize;
    }

}