programmernote.java

有一个接口,用抽象类实现它的部分功能,再用实现类继承抽象类,实现其它没实现的接口方法

package cn.edu.csu.programmer;

public class ProgrammerNote{
//  public String String;
//  private String 临时;
//  private String 变量;
/*
  public void set(String argName){ 
    this.临时 = new String("中国".getBytes());
  }
*/
  static boolean flag;
  public static void main(String[] args){
    ProgrammerNote programmerNote = new ProgrammerNote();
	/*
    int x = 12;
	float f = -12.0f;
	System.out.println(Integer.toBinaryString(12));
    System.out.println(Integer.toOctalString(12));
    System.out.println(Integer.toHexString(12));
	System.out.println(0.0/0);
	System.out.println(x+'a');
    System.out.println(flag);
    */
	//数据类型的自动转换和强制转换
	/*
	int i;
	byte b = 12;
	i = b;
	int j = 266;
	byte x = (byte)j;
	System.out.println(x);
    */
    // 表达式的数据类型的自动提升
	/*
	byte b = 5;
	b = b-2;
	System.out.println(b);
    */
	byte b = 50;
	char c = 'a';
	short s = 1024;
	int i = 50000;
	float f = 5.67f;
	double d = .1234;
	double result = (f * b) + (i / c)-(d * s);
	System.out.println((f * b) + "+" + (i / c) + "-" +(d*s));
	System.out.println(result);
  }
}
//class String{
//}