给定一个十进制数，转换为对应的二进制数

public class ConvertToBinary {
  
  public static final int n = 501; //十进制数
  
  public static final int size = 2;//转换为二进制
  
  public static void main(String[] args){
    int t = n;
    StringBuilder sb = new StringBuilder();
    while (t>0){
      sb.append(t % size);
      t = t /size;
    } 
    for(int i = sb.length()-1 ;i>=0; i--){
      System.out.print(sb.charAt(i));
    }
  }
}

输出结果：111110101