public class Operator4     //布爾運算,也稱邏輯運算
{
    public static void main( String args []) 
    {
        System.out.println("!true = "+(!true));                  //邏輯非
        System.out.println("!false = "+(!false));
        System.out.println("true | false = "+(true | false));    //邏輯或
        System.out.println("true & false = "+(true & false));    //邏輯與
        System.out.println("true ^ false = "+(true ^ false));    //邏輯異或
        boolean b;                                               //b沒有初值,不能輸出
        System.out.println("true || b = "+(true || b));          //條件或,短路運算
        System.out.println("false && b= "+(false && b));         //條件與,短路運算
        int x=0,y=4,z=3;
        System.out.println("x="+x+",y="+y+",z="+z);
        System.out.println("x<y="+(x<y)+",y<z="+(y<z));          //比較運算結果是布爾值
        x=y=z=1;                                                 //可以連續賦值
        System.out.println("x="+x+",y="+y+",z="+z);
        System.out.println(++x & ++y & ++z);                     //位運算 
        System.out.println("x="+x+",y="+y+",z="+z);
    }
}

/*
程序運行結果：
!true = false
!false = true
true | false = true
true & false = false
true ^ false = true
true || b = true
false && b= false
x=0,y=4,z=3
x<y=true,y<z=false
x=1,y=1,z=1
2
x=2,y=2,z=2

沒有^^運算,下列語句
        System.out.println("true ^^ false = "+(true ^^ false));  
產生編譯錯illegal start of expression

Java與C不同之處
        System.out.println("!a="+!a+",!b="+"!b");  
Operator ! cannot be  applied to int
        
        System.out.println("a<b<c="+(a<b<c));
Operator < cannot be  applied to boolean,int

        System.out.println(++x || ++y && ++z);   // 短路的邏輯運算 ??
Operator || cannot be  applied to int,int

        x=1,y=2,z=3;
':' expected
*/