True
Nottrue
Anexceptionisthrownatruntime.
Compilationfailsbecauseofanerroratline12.
Compilationfailsbecauseofanerroratline19.
第1题:
public void testIfA(){if(testIfB("True")){System.out.println("True");}else{System.out.println("Nottrue");}}public Boolean testIfB(Stringstr){return Boolean.valueOf(str);}What is the result when method testIfA is invoked?()
A.True
B.Nottrue
C.Anexceptionisthrownatruntime.
D.Compilationfailsbecauseofanerroratline12.
E.Compilationfailsbecauseofanerroratline19.
第2题:
A.True
B.Not true
C.An exception is thrown at runtime.
D.Compilation fails because of an error at line 12.
E.Compilation fails because of an error at line 19.
第3题:
下面程序执行后,输出的结果是( )。 public class Test { public static void main (String[] )args) { boolean m=true; if(m==false) System.out.println("假"); else if(m====true) System.out.println("真"); else System.out.println ("错误"); } }
A.真
B.假
C.错误
D.编译出错
第4题:
public static void main(String[] args) { String str = “null‟; if (str == null) { System.out.println(”null”); } else (str.length() == 0) { System.out.println(”zero”); } else { System.out.println(”some”); } } What is the result?()
第5题:
public static void parse(String str) { try { float f= Float.parseFloat(str); } catch (NumberFormatException nfe) { f= 0; } finally { System.out.println(f); } } public static void main(String[] args) { parse(”invalid”); } What is the result?()
第6题:
11.publicvoidtestIfA(){12.if(testIfB(”True”)){13.System.out.println(”True”);14.}else{15.System.out.println(”Nottrue”);16.}17.}18.publicBooleantestIfB(Stringstr){19.returnBoolean.valueOf(str);20.}WhatistheresultwhenmethodtestIfAisinvoked?()
A.True
B.Nottrue
C.Anexceptionisthrownatruntime.
D.Compilationfailsbecauseofanerroratline12.
E.Compilationfailsbecauseofanerroratline19.
第7题:
public void foo( boolean a, boolean b ){ if( a ) { System.out.println( “A” ); } else if ( a && b ) { System.out.println( “A&&B” ); } else { 17. if ( !b ) { System.out.println( “notB” ); } else { System.out.println( “ELSE” ); } } } What is correct?()
第8题:
public static void main(String[]args){String str="null";if(str==null){System.out.println("null");}else(str.length()==0){System.out.println("zero");}else{System.out.println("some");}}What is the result?()
A.null
B.zero
C.some
D.Compilationfails.
E.Anexceptionisthrownatruntime.
第9题:
public class Test { public static void main(String [] args) { boolean assert = true; if(assert) { System.out.println(”assert is true”); } } } Given: javac -source 1.3 Test.java What is the result?()
第10题:
boolean bool = true; if(bool = false) { System.out.println(“a”); } else if (bool) { System.out.println(“c”); } else if (!bool) { System.out.println(“c”); } else { System.out.println(“d”); } What is the result?()