System.out.println("x+y="+(x+y));是对的

system.out.println system.out.println是什么意思啊. java 中System.out.println()是什么意思? System.out.println(4 | 3) 结果是多少? System.out.println(Max+ +Min）是什么意思 if 1991 System.out.println (Child);elseSystem.out.println (everything is just beginning);end求翻译 Math.round?大侠们帮忙.public class Test {/*** @param args*/public static void main(String[] args) {System.out.println(Math.round(-11.5));System.out.println(Math.round(-12.4));System.out.println(Math.round(-12.5));System.out.println(Math.round(-1 java 中 System.out.println( sdfsdf  sdfs );  是什么意思? System.out.println(x=+x+,y=+y); System.out.println(s1 = + s1); 为什么要这么写? System.out.println(x+ +y);括号里德X+是什么意思 int a = 8,b = 9; if (a = b){ System.out.println(true); }else{ System.out.println(false); } int m = 1; int n = 2; double y = 2.0; System.out.println(m + n); //3 System.out.println(m - n); //-1int m = 1;int n = 2;double y = 2.0;System.out.println(m + n); //3System.out.println(m - n); //-1System.out.println(m * n); //2System.out.println(m / n System.out.println(0.1*10); System.out.println(0.1+0.1+0.1+0.1+0.1+0.1+0.1+0.1+0.1+0.1);System.out.println(0.4+0.2);大伙给算算并解释以下原因,主要是解释原因.偶挺纳闷的 class A{ public A(){ System.out.println( String a); } }class B extends A{public B(){System.out.println(String b);}}class C extends B{public C(){System.out.println(String c);}}public class ConstructorTest{ public static void main(Stringargs[]){C System.out.println(false&(1/0==0))和System.out.println(false&&(1/0==0))的区别? java (Father.value+value);和(Father.value++value);有什么区别java System.out.println(Father.value+value);和System.out.println(Father.value++value);有什么区别? System.out.println(false&&true||true); System.out.println(true||true&&false);能不能详细描述一下怎么怎么运行的,打印都是true ,有点晕；