Java经典重现之方法重载导致java.lang.StackOverflowError异常

由于代码写的不够严谨，经常认为万无一失的地方却出现了重大问题，比如说简单的一个方法重载导致的栈溢出。这种问题已经看到好几次了，虽然代码不是自己写的，还是应该引起重视。

目录

定义接口和实现

错误日志

---

定义接口和实现

接口：

package com.boonya.stackerror;
 
public interface Geometry {
    
    /**
     * 工作
     */
    void doWork();
 
}

实现一：

package com.boonya.stackerror;
 
public class LineString implements Geometry{
 
	public void doWork() {
		// TODO Auto-generated method stub
		System.out.println("LineString do work.");
	}
 
}

实现二：

package com.boonya.stackerror;
 
public class Polygon implements Geometry{
 
	public void doWork() {
		// TODO Auto-generated method stub
		System.out.println("Ploygon do work.");
	}
 
}

 服务方法多重载：

package com.boonya.stackerror;
 
public class GeometryService {
	
	/**
	 * 栈溢出方法
	 * 
	 * @param geometry
	 * @param polygon
	 */
	public static void  check(LineString geometry,Polygon polygon){
		check(geometry, polygon);
	}
	
	/**
	 * 目标方法
	 * @param geometry
	 * @param geometry2
	 */
    public static void  check(Geometry geometry,Geometry geometry2){
    	geometry.doWork();
    	geometry2.doWork();
	}
 
}

package com.boonya.stackerror;
 
public class GeometryService {
	
	/**
	 * 栈溢出方法
	 * 
	 * @param geometry
	 * @param polygon
	 */
	public static void  doWork(LineString geometry,Polygon polygon){
		doWork(geometry, polygon);
	}
	
	/**
	 * 目标方法
	 * @param geometry
	 * @param geometry2
	 */
    public static void  doWork(Geometry geometry,Geometry geometry2){
    	geometry.doWork();
    	geometry2.doWork();
	}
 
}

 

测试类：

package com.boonya.stackerror;
 
public class StackErrorTest {
 
	public static void main(String[] args) {
		LineString lineString = new LineString();
		Polygon polygon = new Polygon();
		GeometryService.check(lineString, polygon);
 
	}
 
}

package com.boonya.stackerror;
 
public class StackErrorTest {
 
	public static void main(String[] args) {
		LineString lineString = new LineString();
		Polygon polygon = new Polygon();
		GeometryService.doWork(lineString, polygon);
 
	}
 
}

 

错误日志

栈溢出的日志会一直打印下去，直到程序被关闭：

Exception in thread "main" java.lang.StackOverflowError
	at com.boonya.stackerror.GeometryService.check(GeometryService.java:12)
	at com.boonya.stackerror.GeometryService.check(GeometryService.java:12)
	at com.boonya.stackerror.GeometryService.check(GeometryService.java:12)
	at com.boonya.stackerror.GeometryService.check(GeometryService.java:12)
	at com.boonya.stackerror.GeometryService.check(GeometryService.java:12)
	at com.boonya.stackerror.GeometryService.check(GeometryService.java:12)
	at com.boonya.stackerror.GeometryService.check(GeometryService.java:12)
	at com.boonya.stackerror.GeometryService.check(GeometryService.java:12)

Exception in thread "main" java.lang.StackOverflowError
	at com.boonya.stackerror.GeometryService.doWork(GeometryService.java:12)
	at com.boonya.stackerror.GeometryService.doWork(GeometryService.java:12)
	at com.boonya.stackerror.GeometryService.doWork(GeometryService.java:12)
	at com.boonya.stackerror.GeometryService.doWork(GeometryService.java:12)
	at com.boonya.stackerror.GeometryService.doWork(GeometryService.java:12)
	at com.boonya.stackerror.GeometryService.doWork(GeometryService.java:12)
	at com.boonya.stackerror.GeometryService.doWork(GeometryService.java:12)
	at com.boonya.stackerror.GeometryService.doWork(GeometryService.java:12)
	at com.boonya.stackerror.GeometryService.doWork(GeometryService.java:12)
	at com.boonya.stackerror.GeometryService.doWork(GeometryService.java:12)

 

这样我们就重现了一个栈溢出的情形。