relationop.java

Java面向对象编程(随书配套源代码) 阐述了面向对象编程的思想

package chapter4;

public class RelationOp 
{

	public static void main(String[] args) 
	{
		short s =1;
		int i = 1;
		long L =2L;
	    float f =3f;
	    double d = 4.0;
	    boolean b1 = true,b2= false;
		char c1= 'A',c2='B';
		
		if(b1 == b2)
		{
			System.out.println("布尔型变量作相等关系比较运算");
		}
		else if(i!=s)
		{
			System.out.println("整型变量与短整型变量作不相等关系比较运算");
		}
		else if(f>d)
		{
			System.out.println("双精度与单精度型变量作大于比较运算");
		}
		else if(c1>=c2)
		{
			System.out.println("字符型变量作大于等于比较运算");
		}	
		else if(f<L)
		{
			System.out.println("实型变量与长整型变量作小于比较运算");
		}
		else if(i<=L)
		{
			System.out.println("长整型变量与整型变量作小于等于比较运算");
		}
		
		
	}
}