二進制到十進制的轉換在Java中

Question

我試圖用Java編寫一個程序只使用這需要十進制數爲一個int參數，輸出到屏幕十進制數... 的二進制相當於總之十進制到二進制轉換int參數...

解決方案將非常感激。我已經嘗試了一些措施，但我沒有成功.. 感謝

Answer 1

Integer.toString(input, 2); 

OR

Integer.toBinaryString(input); 

您還可能要結帳：

Integer.toHexString 
Integer.toOctalString 

INPUT : 10 (decimal) 
RESULT: 1010 (binary) 

希望這有助於:)

Answer 2

或者你可以寫這樣的程序（修改）：

import java.util.Scanner; 

public class DecToBinary { 

public static void main(String[] args) { 

    Scanner input = new Scanner(System.in); 
    int broj; 

    System.out.print("Enter number that you want to conver to binary: "); 
    broj = input.nextInt(); 

    convert(broj); 

} 

public static void convert(int a) { 
    String obrnuti = ""; 
    while (a > 0) { 
    int x = a % 2; 
    obrnuti += x; 
    a /= 2; 
    } 
    System.out.println(reverse(obrnuti)); 
} 

public static String reverse(String a) { 
    String novi = ""; 
    for (int i = a.length() - 1; i >= 0; i--) { 
     char c = a.charAt(i); 
     novi += c; 
    } 
    return novi; 
} 
} 

Answer 3

轉換從十進制到二進制：

從二進制3210

Integer.toBinaryString(Int_variable) 

轉換爲十進制：

Integer.parseInt(string_binary_variable,2) 

Answer 4

public class BinaryToDecimal { 

    public static void main(String[] args) { 
     String binary = "110"; 
     System.out.println(binToDec(binary)); 
    } 

    public static int binToDec(String binary){ 
     int decimal=0; 
     for(int i=0;i<binary.length();i++){ 
      decimal = 2*decimal + Integer.parseInt("" + binary.charAt(i)); 
     } 
     return decimal; 
    } 
} 

Answer 5

public class DecimalToBinary 
{  
    // 5 = 101 

    public static void main(String[] args) 
    { 
     int d2b = dec2Bin(5); 
     System.out.println(d2b); 
    } 

    public static int dec2Bin(int num){ 
     int a = num; 
     int binary=0; 
     int i=1; 
     while(a != 0){ 
      binary = binary+i*(a%2); 
      a = a/2; 
      i=i*10; 
     } 
     return binary; 
    } 
}