7 数据定义

    public static void main(String[] args){
        short a = 100;
        int b = 10000;
        long c = 10000000;
        float d = 2.5f;
        double e = -1.33;
        boolean f = true;
        char g = 'a';
        System.out.println(a);
        System.out.println(b);
        System.out.println(c);
        System.out.println(d);
        System.out.println(e);
        System.out.println(f);
        System.out.println(g);
    }
}
'''