编辑代码

class Main {
	public static void main(String[] args) {
        int a=12;
        char b='d';
        double c=23.65;
        float d=34.65f;
        System.out.println("a="+a);
        System.out.println("b="+b);
        System.out.println("c="+c);
        System.out.println("d="+d);  
		System.out.println("Hello JSRUN!   \n\n         欧子建.");
	}
}