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1、J2EE部分1、运算符优先级问题,下面代码的结果是多少?(笔试)package test;public class Test public static void main(String args) int k = 0;int ret = +k + k+ + +k + k;/ ret的值为多少System.err.println(ret);2、运算符问题,下面代码分别输出什么?(笔试) package test;public class Test public static void main(String args) int i1 = 10, i2 = 10;System.err.print
2、ln(i1 + i2 = + i1 + i2);System.err.println(i1 - i2 = + i1 - i2);System.err.println(i1 * i2 = + i1 * i2);System.err.println(i1 / i2 = + i1 / i2);3、下面代码的结果是什么?还是抛出异常?(笔试) package test;public class Test public void myMethod(String str) System.err.println(string);public void myMethod(Object obj) System.
3、err.println(object);public static void main(String args) Test t = new Test();t.myMethod(null);4、假设今天是9月8日,下面代码输出什么?(笔试) package test;import java.util.Date;public class Test public static void main(String args) Date date = new Date();System.err.println(date.getMonth() + + date.getDate();5、下面代码的输出结果是什
4、么? package test;public class Test public static void main(String args) double val = 11.5;System.err.println(Math.round(val);System.err.println(Math.floor(val);System.err.println(Math.ceil(val);6、下面代码的结果是什么?package test;public class Test extends Base public static void main(String args) Base b = new
5、Test();b.method();Test t = new Test();t.method();Overridepublic void method() System.err.println(test);class Base public void method() throws InterruptedException System.err.println(base);7、以下代码的结果是什么? package test;public class Test extends Base public static void main(String args) new Test().method
6、();public void method() System.err.println(super.getClass().getName();System.err.println(this.getClass().getSuperclass().getName();class Base 8、true or false?package test;public class Test public static void main(String args) String str1 = new String(abc);String str2 = new String(abc);System.err.pri
7、ntln(str1.equals(str2);StringBuffer sb1 = new StringBuffer(abc);StringBuffer sb2 = new StringBuffer(abc);System.err.println(sb1.equals(sb2);9、输出的结果是什么? package test;public class Test public static void main(String args) System.err.println(new Test().method1();System.err.println(new Test().method2();
8、public int method1() int x = 1;try return x; finally +x;public int method2() int x = 1;try return x; finally return +x;这样呢?输出什么 package test;public class Test public static void main(String args) System.err.println(method();public static boolean method() try return true; finally return false; 10、方法m
9、1和m2有区别吗?什么区别 package test;public class Test public static void main(String args) public synchronized void m1() public static synchronized void m2() 11、true or false?理由 package test;public class Test public static void main(String args) Integer i1 = 127;Integer i2 = 127;System.err.println(i1 = i2);i
10、1 = 128;i2 = 128;System.err.println(i1 = i2);12、true or false?理由 package test;public class Test public static void main(String args) String str1 = a;String str2 = a;String str3 = new String(a);System.err.println(str1 = str2);System.err.println(str1 = str3);str3 = str3.intern();System.err.println(str
11、1 = str3);13、true or false?理由 package test;public class Test public static void main(String args) System.err.println(12 - 11.9 = 0.1);14、以下代码输出是什么? package test;import java.math.BigInteger;public class Test public static void main(String args) BigInteger one = new BigInteger(1);BigInteger two = new
12、BigInteger(2);BigInteger three = new BigInteger(3);BigInteger sum = new BigInteger(0);sum.add(one);sum.add(two);sum.add(three);System.out.println(sum.toString();15、输出的结果是什么?12345?根据单词排序?还是? package test;import java.util.HashSet;import java.util.Iterator;import java.util.Set;public class Test public
13、static void main(String args) Set set = new HashSet();set.add(one);set.add(two);set.add(three);set.add(four);set.add(five);for (Iterator it = set.iterator(); it.hasNext();) System.err.println(it.next();16、以下代码输出的结果(笔试选择题)public class Test public static void main(String args) System.err.println(args.length);A. nullB. 0C. TestD. Exception in thread main java.lang.NullPointerExcepti