不会清零 打印机

/卷
private int paperNumber;
private boolean isOutPaper;
public Printer(int paperNumber){
this.paperNumber = paperNumber;
}
public void print(){
if(this.paperNumber>=700 && this.isOutPaper == false){
this.paperNumber -= 700;
System.out.println(“正在打印，打印机还剩余” + this.paperNumber + “张纸”);
}
else{
System.out.println(“纸张不够，停止打印”);
}
}
public void outPaper(){
this.isOutPaper = true;
System.out.println(“打印机取纸中，请勿连续操作”);
}
public void putPaper(int paperNumber){
this.paperNumber += paperNumber;
isOutPaper = false;
System.out.println(“装纸完成”);
}

}

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