public class HelloWorld {
    public static void main(String[] args) {
        int i = 10;
        int i2 = 020;
        int i3 = 0x12;
        int i4 = 0b111;
        System.out.println(i);
        System.out.println(i2);
        System.out.println(i3);
        System.out.println(i4);
        System.out.println("__________________________________________________");
        //浮点数
        char c1 = ‘A‘;
        char c2 = ‘中‘;
        System.out.println(c1);
        System.out.println((int)c1);
        System.out.println(c2);
        System.out.println((int)c2);
        char c3 =‘\u0061‘;
        System.out.println(c3);
        System.out.println("Hello\tWorld!");
        System.out.println("Hello\nWorld!");
    }
}







程序运行结果：

10
16
18
7
__________________________________________________
A
65
中
20013
a
Hello World!
Hello
World!

Process finished with exit code 0

数据类型