import static net.mindview.util.Print.*;

class Shape {
    Shape(int i) { print("Shape constructor"); }
    void dispose() { print("Shape dispose"); }        
}

class Circle extends Shape {
    Circle(int i) {
        super(i);
        print("Drawing Circle");
    }
    void Dispose() {
        print("Erasing circle");
        super.dispose();
    }
}

class Triangle extends Shape {
    Triangle(int i) {
        super(i);
        print("Drawing Triangle");
    }    
    void dipsose() { 
        print("Erasing Triangle"); 
        super.dispose();    
    }
}

class Line extends Shape {
    private int start, end;
    Line(int start, int end) {
        super(start);
        this.start = start;
        this.end = end;
        print("Drawing Line: " + start + ", " + end); 
    }
    void dispose() {
        print("Erasing Line: " + start + ", " + end);
        super.dispose();
    }
}

public class CADSystem16 extends Shape {
    private Circle c;
    private Triangle t;
    private Line[] lines = new Line[3];
    public CADSystem16(int i) {
        super(i + 1);
        for(int j = 0; j < lines.length; j++)
            lines[j] = new Line(j, j*j);
        c = new Circle(1);
        t = new Triangle(1);
        print("Combined constructor");
    }
    public void dispose() {
        print("CADSystem.dispose()");
        // The order of cleanup is the reverse
        // of the order of initialization
        t.dispose();
        c.dispose();
        for(int i = lines.length - 1; i >= 0; i--)
            lines[i].dispose();
        super.dispose();
    }
    public static void main(String[] args) {
        CADSystem16 x = new CADSystem16(47);
        try {
            print("Returning from try block");
            return;
            // unreachable statement:
            // print("You can't see this");
            // but finally block will still execute:
        } finally {
            x.dispose();
        } 
    }    
}

class Circle extends Shape {
    Circle(int i) {
        super(i);
        print("Drawing Circle");
    }
    void Dispose() {
        print("Erasing circle");
        super.dispose();
    }
}

class Triangle extends Shape {
    Triangle(int i) {
        super(i);
        print("Drawing Triangle");
    }    
    void dipsose() { 
        print("Erasing Triangle"); 
        super.dispose();    
    }
}

------解决方案--------------------
拼错了
还是仔细一点好
还有最好不要这样用
为什么一定要用这么相似的名字
换一个名字吧

------解决方案--------------------
首先不知道楼主在哪里抄来的东西，发在这里害的大家花了那么长时间来帮你调试。

其次您真的重写方法。方法名写错了，建议：加上@Override,在被重写的方法上，但是需要在jdk1.5版本以上，

其他楼主也没问。
就到这里吧。
代码我帮该了：