1.3.2 更强的数值文本表示法

Demo:

public class CoinNumText {
    
    public static void main(String[] args) {
        
        /** 1. 二进制文本 **/
        int xBeforeJava7 = Integer.parseInt("11001100", 2);
        int xJava7 = 0b11001100;

        /** 2. 数字中的下划线 **/
        long anotherLong = 2_147_483_648L;
        int bitPattern = 0b0001_1100__0011_0111__0010_1011__1010_0011;
        
        /** print **/
        System.out.println(xBeforeJava7);
        System.out.println(xJava7);
        System.out.println(anotherLong);
        System.out.println(bitPattern);
        
    }

}

Ran As Java Application:

204
204
2147483648
473377699