Java基礎---異常---練習

標籤：

package com.train;import java.lang.Math;/******************** * java.lang.Object        java.lang.Math * static double sqrt(double a)---返回正確舍入的 double 值的正平方根。  * ******************/class NoSanjiaoException extends RuntimeException{    NoSanjiaoException(String msg) {        super(msg);    }}public class ExceptionTest {    public static void main(String[] args) {                Sanj sanj = new Sanj(10,20,30);                System.out.println("This Sanj‘ area is  "+sanj.getArea());        sanj.showInfo();    }}class Sanj{    private double x = 0;    private double y = 0;    private double z = 0;    private double cirLength = 0;        Sanj(double argX ,double argY, double argZ) throws NoSanjiaoException{        this.x = argX;        this.y = argY;        this.z = argZ;        this.cirLength = this.x + this.y +this.z;        if(x+y<=z||x+z<=y||y+z<=x){            throw new NoSanjiaoException("此三邊無法構成三角形！");        }    }        public void showInfo(){        System.out.println("Sanj‘ x = "+this.x+"; y = "+this.y+"; z = "+this.z);    }        public double getArea(){        return Math.sqrt(cirLength*(cirLength-x)*(cirLength-y)*(cirLength-z));    }}

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Java基礎---異常---練習