Java实现进制之间的转换

@ sourceNum:10进制的源数字

@ baseNum:    目的进制

package com.wjy.algorithm;

import java.util.Stack;

public class SystemTransform {
	private int sourceNum;
	private int baseNum;
	public SystemTransform(int sourceNum,int baseNum){
		this.sourceNum=sourceNum;
		this.baseNum=baseNum;
	}
	public void transform(){
		if(sourceNum<0 || baseNum<0)
		{
			throw new IllegalArgumentException("the parameter is valid.");
		}
		Stack<Integer> stack=new Stack<Integer>();
		while(sourceNum!=0){
			stack.push(Integer.valueOf((Integer)(sourceNum%baseNum)));
			sourceNum/=baseNum;
		}
//		System.err.println(stack.size());
		if(stack.empty()){
			System.out.println("result is 0.");
		}else{
			int len=stack.size();
			for(int i=0;i<len;i++){    //以前这里是这样写的for(int i=0;i<stack.size();i++)想想为什么不对？？？血的教训
				System.out.print(stack.pop());
//				System.err.println("i is:"+i);
//				System.err.println("size is:"+stack.size());
			}
			System.out.println("\n");
		}
	}
}

 

调用代码是：

package com.wjy.algorithm;

public class MainTest {
	public static void main(String args[]){
		SystemTransform systemTransform=new SystemTransform(1348, 8);
		systemTransform.transform();
	}
}