Java 十进制转二进制 ​

public static int[] valueToBinary(int size, int value) {
        String str = Integer.toBinaryString(value);
        int[] buffer = new int[size];
        int start = buffer.length - str.length();
        for (int i = 0; i < str.length(); i++) {
            buffer[start++] = Integer.parseInt(str.substring(i, i + 1));
        }

        return buffer;
    }

public static int[] valueToBinary(int size, int value) {
        String str = Integer.toBinaryString(value);
        int[] buffer = new int[size];
        int start = buffer.length - str.length();
        for (int i = 0; i < str.length(); i++) {
            buffer[start++] = Integer.parseInt(str.substring(i, i + 1));
        }

        return buffer;
    }