16、10、8进制

import java.util.Scanner;

public class Main{

	public static void main(String[] args) {
		
		Scanner sc=new Scanner(System.in);
		
		String str=sc.nextLine();
		
		String h=Integer.toHexString(Integer.valueOf(str,16)).toUpperCase();     //转换为16进制
		
        if(h.length()==3){
	    	
	    	System.out.println("Hex: 0x"+h);
	    	
	    }else if(h.length()==2){
	    	
	    	System.out.println("Hex: 0x0"+h);
	    	
	    }else if(h.length()==1){
	    	
	    	System.out.println("Hex: 0x00"+h);
	    }
		
	    Integer d=Integer.valueOf(str,16);       //转换为10进制
	    
	    System.out.println("Decimal: "+d);
	    
	    String o=Integer.toOctalString(Integer.valueOf(str, 16));   //转换为8进制
	    
	    if(o.length()==4){
	    	
	    	System.out.println("Octal: "+o);
	    	
	    }else if(o.length()==3){
	    	
	    	System.out.println("Octal: 0"+o);
	    	
	    }else if(o.length()==2){
	    	
	    	System.out.println("Octal: 00"+o);
	    	
	    }else if(o.length()==1){
	    	
	    	System.out.println("Octal: 000"+o);
	    }	
	}
}


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转载自blog.csdn.net/wz1997/article/details/79057063