关于java异常处理问题。
class TooFewLegsError extends Exception { private int legs; public TooFewLegsError(int l){legs=l;} public int getLegs(){return legs;} } class ZeroSideError extends Exception { private int sides; public ZeroSideError(){}; public int getSides(){return sides;} } class IrregularShapeError extends Exception { private int shapes; public IrregularShapeError(){} public int getShapes(){return shapes;} } class Table { private int shape; private int legs; private int sides; public Table(int shape1,int s,int l) throws TooFewLegsError, ZeroSideError, IrregularShapeError { if(l<4) throw new TooFewLegsError(l); else if(s<=0) throw new ZeroSideError(); else if(shape==4) throw new IrregularShapeError(); else shape=shape1; legs=l; sides=s; } public void setLegs(int l) throws TooFewLegsError { if(l<4) throw new TooFewLegsError(l); } public void setSides(int s) throws ZeroSideError { if(s<=0) throw new ZeroSideError(); } public void setShape(int shape1) throws IrregularShapeError { if(shape==4) throw new IrregularShapeError(); else shape=shape1; } public static void main(String argv[]) { try { Table t=new Table(3,-2,0); t.setShape(3); t.setSides(-2); t.setLegs(0); } catch (IrregularShapeError n) { System.out.println( "不可能有不规则的桌子。"); } catch (TooFewLegsError n) { System.out.println("桌腿数量错误。" + n.getLegs() + "条腿的桌子不存在."); } catch (ZeroSideError n) { System.out.println( "桌子不能有0个角"); } } } public void setShape(int shape1) throws IrregularShapeError { if(shape==3) throw new IrregularShapeError(); else shape=shape1; }public void setSides(int s) throws ZeroSideError { if(s<=0) throw new IrregularShapeError(); }