[Java知识库]Java课后题第十二章：12.5（TriangleException异常）

目录

1、自定义TriangleException类

2、修改Triangle类

3、Demo示例

1、自定义TriangleException类

public class TriangleException extends Exception {
    public TriangleException() {
    }
    public TriangleException(String message) {
        super(message);
    }
}

2、修改Triangle类

public Triangle(double side1,double side2,double side3) 
            throws TriangleException {
        if((side1+side2)>side3&&(side1+side3)>side2&&(side2+side3)>side1){
            this.side1=side1;this.side2=side2;this.side3=side3;}
        else
            throw new TriangleException("the wrong name!");
    }

3、Demo示例

public class Test1 {
    public static void main(String[] args) {
        try {
            Triangle tri = new Triangle(2, 4, 6);
        } catch (TriangleException ex) {
            ex.printStackTrace();
        }
    }
}

PackageP12.TriangleException: the wrong name!
	at PackageP11.Triangle.<init>(Triangle.java:14)
	at PackageP12.Test1.main(Test1.java:8)

Process finished with exit code 0