Thread: what is wrong with my return statement??????

the compiler give me the following error :
D:\javafiles\Image Matching Algorithm\ImageMatchingAlgorithm.java:15: missing return statement
}
^
D:\javafiles\Image Matching Algorithm\ImageMatchingAlgorithm.java:21: missing return statement
}
^
2 errors

Process completed.

 
import java.util.*;
import  java.lang.*;
 
 
public class ImageMatchingAlgorithm
{
	int swaped1;
	int swaped2;
	int isolated;
 
	public boolean hasReversed(int mw_axis, int sw_axis)
	{
		if(sw_axis > mw_axis)
			return true;	
	}	
 
	public boolean isTangible (int mw_axis, int sw_axis)
	{
		if (mw_axis == sw_axis)
			return true;
	}	
	public void doIsolate(int mw_axis)
	{
		isolated=mw_axis-1;
	}
	public int getIsolated()
	{
		return isolated;
	}
	public void doSwap(int coor1, int coor2)
	{
		swaped1=coor2;
		swaped2=coor1;
	}
	public int getMWSwapedDim()
	{
		return swaped1;
	}
	public int getSWSwapedDim()
	{
		return swaped2;
	}
 
	public static void main (String[] args) 
	{
		Scanner readDim = new Scanner(System.in);
		int scanx;
		int scany;
 
		ImageMatchingAlgorithm Obj = new ImageMatchingAlgorithm();
		MainWindow mw = new MainWindow();
		SubWindow  sw = new SubWindow();
 
		    System.out.print("Dimension of MW X axis:");
		    scanx=readDim.nextInt();
	        mw.setDimX(scanx);
		              System.out.print("Dimension of MW Y axis:");
		              scany=readDim.nextInt();
		              mw.setDimY(scany);
		                        System.out.print("Dimension of SW X axis:");
	                         	scanx=readDim.nextInt();
		                        sw.setDimX(scanx);
		                                  System.out.print("Dimension of SW Y axis:");
		                                  scany=readDim.nextInt();
		                                  sw.setDimY(scany);
 
	 	    if (Obj.hasReversed(mw.getDimX(), sw.getDimX()) )
	 	    {
			     Obj.doSwap(mw.getDimX(), sw.getDimX());
			     mw.setDimX(Obj.getMWSwapedDim());
			     sw.setDimX(Obj.getSWSwapedDim());
	 	    }    
		          if (Obj.isTangible(mw.getDimX(), sw.getDimX()))
		          {
		               Obj.doIsolate(mw.getDimX());
			           sw.setDimX(Obj.getIsolated());
		          }
		                if (Obj.hasReversed(mw.getDimY(), sw.getDimY()) )
	 	                {
			                 Obj.doSwap(mw.getDimY(), sw.getDimY());
			                 mw.setDimY(Obj.getMWSwapedDim());
			                 sw.setDimY(Obj.getSWSwapedDim());
	 	                }    
 
		                      if (Obj.isTangible(mw.getDimY(), sw.getDimY()))
		                      {
		                           Obj.doIsolate(mw.getDimY());
			                       sw.setDimY(Obj.getIsolated());
		                      }	
 
 
	}
}