ex7_9.java

判断三角形

//7.9 十进制转换为十六进制数
import javax.swing.JOptionPane;
public class Ex7_9{
  public static void main (String[] args) {
    int num1=298,num2=9123;
    System.out.println(num1+"的十六进制表示为："+convertDecimalToHex(num1));
    System.out.println(num2+"的十六进制表示为："+convertDecimalToHex(num2));
  }
  public static String convertDecimalToHex(int value) {
     StringBuffer buffer = new StringBuffer();
     while (value!=0){
            int num = value%16;
            char c;
            if(num<=9) c=(char)(num+'0');
            else c=(char)(num-10+'A');//大于等于10的数字在十六进制中用A、B、C、D、E代替
            buffer.insert(0, c);
            value= value/16;
        }
        return buffer.toString();
    }
}