使用String s1=new String("Java");String s2=new String("Java")创建两个字符串时,s1,s2使用不同的内存空间

使用String s1=new String("Java");String s2=new String("Java")创建两个字符串时,s1,s2使用不同的内存空间


相关考题:

( 17 )阅读下面程序public class OperatorsAndExpressions {void equalsMethod1(){String s1=new String("how are you");String s2=new String("how are you");System.out.println(s1==s2);}public static void main(String args[]){OperatorsAndExpressions perAndExp=new OperatorsAndExpressions();// 用于复合类型数据的 “ == ” 运算符OperAndExp. equalsMethod1();}}程序运行结果是A ) ==B ) trueC ) falseD ) equal

在执行下面这段Java程序时: public class Test { public static void main (String[] args) { String s1=args[0]; String s2=args[1]; String s3=args[2]; } }若编译程序后键入命令: java Test one two three,那么变量s1所引用的字符串为( )。A.nullB.testC.oneD.java

下面的程序执行后,屏幕上显示的应是 public class Exam{ public static void main(String[]args){ char char1[]={'t','e','s','t'}; char char2[]={'t','e','S','t','1'}; String s1=new String(char1); String s2=new String(char2,0,4); System.out.println(s1.equals(s2)); } }A.trueB.falseC.testD.编译错误

分析两个字符串,分别输出每个字符串的单词并统计出单词个数。阅读程序,填写空行。注意:不改动程序结构,不得增行或删行。import java.util.*;public class ex2{public static void main(String args[]){String s1="I am Chinese,she is my girlfriend";String s2="Oh,really,fine";StringTokenizer fenxi_1=new StringTokenizer(s1,",");StringTokenizer fenxi_2=new StringTokenizer(s2,",");int n1=fenxi_1.countTokens();int n2=fenxi_2.countTokens();while(fenxi_1.hasMoreTokens()){String s=fenxi_1.nextToken();System.out.println(s);}System.out.println("s1单词:"+n1+"个");while(fenxi_1.hasMoreTokens()){String s=______;System.out.println(s);}System.out.println("s2单词:"+n2+"个");}}

有如下applet代码:import java.applet.*;import java.awt.*;public class MyApplet extends Applet{AA s;public void int(){s = new AA("Hello!", "I love JAVA.");}public void paint(Graphics g){g.drawString(s.toString(), 30, 50);}}class AA{String s1;String s2;AA(String str1, String str2){s1 = str1;s2 - str2;}public String toString(){return s1 + s2;}}运行后,窗口上将会出现什么,选择一个正确答案______。A.Hello!B.I love JAVA.C.Hello! I love JAVA.D.什么都没有

下列语句输出结果为( )。 public class test\ { public static void main (String args[]) { String s1=new String("How"); String s2=new String("How"); System.out.println(!(s1.equals(s2))); } }A.falseB.trueC.0D.1

下面程序的运行结果是( )。 public class OperatorsAndExpressions{ void equalsMethod1( ){ //基本类型的数据之间的比较 int i=10,j=15; System.out,println(i==j); //复合数据类型的数据之间的比较 String s1=new String ("how are you"); String s2=new String ("how are you"); System.out.println(s1==s2): } public static void main (String args[ ]){ OperatorsAndExpressions OperAndExp=new OperatorsAndExpressions( ): //用于基本类型数据和复合类型数据的=="运算符 OperAndExp,equalsMethod1( ) } }A.false falseB.false trueC.tree falseD.true true

下列程序段: String s1=new String("How"); String s2=new String("How"); System.out.println(!(s1==s2)); 的结果为A.falseB.trueC.1D.0

下列程序的执行结果是______。 public class Test9 { public static void main(String[] args) { String s1 = new String("I am a girl"); String s2 = new String("I am a girl"); System.out.println (s1.equal (s2)); } }A.trueB.假C.I amgirlD.都不正确

阅读下面程序 public class OperatorsAndExpressions{ void equalsMethodl(){ String s1=new String("how are you"); String s2=new String("how are you"); System.out.println(s1==s2); } public static void main(String args[]){ OperatorsAndExpressionsOperAndExp=new OperatorsAndExpressions(); //用于复合类型数据的“==”运算符 OperAndExp.equalsMethod1(); } } 程序运行结果是A.=B.trueC.falseD.equal

下列语句能给数组赋值而不使用for循环的是A.myArray{[1]="One";[2]="Two";[3]="Three";}B.String s[5]=new String[]{"Zero", "One", "Two", "There", "Four"};C.String s[]=new String[]{"Zero", "One", "Two", "There", "Four"};D.String s[]=new String[]=|"Zero", "One", "Two", "There", "Four"};

下面程序代码运行结果为( )。 import java.awt.*; public class Test { public static void main (String args[]) { String s1="a+b+c"; String s2="+"; int i=s1.lastIndexOf (s2); System.out.println(i); } }A.0B.1C.2D.3

下列代码的执行结果是( )。 public class Test{ public static void main String args[]){ String s1=new String("welcome"); String s2=new String("welcome"); System.out.println(s1==s2); System.out.println(s1.equals(s2)); } }A.false,falseB.false,trueC.true,trueD.true,false

阅读下面程序 public class OperatorsAndExpressions { void equalsMethodl(){ String s1=new String("how are you"); String s2=new String("how are you"); System.out.println(s1==s2); } public static void main(String args[]){ OperatorsAndExpressions perAndExp=new OperatorsAndExpressions(); OperAndExp.equalsMethod1(); } } 程序运行结果是( )。A. ==B.trueC.假D.equal

下列语句输出结果为( )。 public class test { public static void main(StringArgsl[]) { String s1=new String("How"); String s2=new String("How"); System.out.println(!(s1==s2)); } }A.falseB.trueC.1D.0

下列代码段的执行结果是( )。 public class Test { public static void main(String args[ ]) { String s1= new String("hello"); String s2= new String("hello"); System.out.println(s1==s2); System.out.println(s1.equal(s2)); } }A.true falseB.true trueC.false trueD.false false

有如下代码段 public class OperatorAndExceptions { public static void main(String args[ ] { int i=10,j=15; System.out.println(i==j); String s1 = new String("how are you!"); String s2=new String("how are you!"); System.out.println(s1==s2); } } 其输出为( )。A.true falseB.true trueC.false trueD.false false

下列语句输出结果为( )。public class test{public static void main(String args []){String s1=new String("How");String s2=new String("How");System.out.println(!(s1 ==s2));}A.falseB.trueC.1D.0

下列语句能给数组赋值,而不使用for循环的是A.myArray{[1]="One";[2]="Two";[3]="Three";}B.String s[5]=new String[] {"Zero","One","Two","Three","Four"};C.String s[]=new String[] {"Zero","One","Two","Three","Four"};D.String s[]=new String[]= {"Zero","One","Two","Three","Four"};

下列代码的执行结果是______。 public class ex55 { public static void main(String args[] ) { String s1=new String("hello"); String s2=new String("hello"); System.out.print (s1==s2); System.out.print (","); System.out.println (s1.equals (s2)); } }A.true, falseB.true, trueC.false, trueD.false, false

下面程序执行后,屏幕上显示的应是______。 public class Testl0 { public static void main(String[] args) { char char1[] = {'t', 'e', 's', 't'}; char char2[] = ('t', 'e', 's', 't', '1 }; String s1 = new String(char1); String s2 = new String(char2, 0, 4); System.out.println (si.equal (s2)); } }A.trueB.假C.testD.编译错误

若输入 "I am a boy!",下列程序的运行结果为______。 char connect(string1,string2,string) char string1[],string2[],string[]; { int i,j; for (i=0;stringl[i] !='\0';i++) string[i]=stringl[i]; for (j=0;string2[j] !='\0';j++) string[i+j]=string2[j]; string[i+j ] ='\0'; } main ( ) { char s1 [100] , s2 [100] , s [100]; printf ("\n 输入 string1: \n"); scanf("%s",s1); printf (" \n 输入 string2: \n" ); scanf ("%s", s2); connect (s1, s2, s); printf ("%s\n", s); }A.I am a boy!B.输入string2:C.I amD.I am a boy!

下面哪个是对字符串String的正确定义()。A、String s1=null;B、String s2=’null’;C、String s3=(String)‘abc’;D、String s4=(String)‘/uface’;

String s=new String("xyz");创建了几个String Object?

import java.util.*;  public class WrappedString {  private String s;  public WrappedString(String s) { this.s = s; }  public static void main(String[] args) {  HashSet hs = new HashSet();  WrappedString ws1 = new WrappedString(”aardvark”);  WrappedString ws2 = new WrappedString(”aardvark”);  String s1 = new String(”aardvark”);  String s2 = new String(”aardvark”);  hs.add(ws1); hs.add(ws2); hs.add(s1); hs.add(s2);  System.out.println(hs.size()); } }  What is the result?()  A、 0B、 1C、 2D、 3E、 4F、 Compilation fails.G、 An exception is thrown at runtime.

单选题import java.util.*;  public class WrappedString {  private String s;  public WrappedString(String s) { this.s = s; }  public static void main(String[] args) {  HashSet hs = new HashSet();  WrappedString ws1 = new WrappedString(”aardvark”);  WrappedString ws2 = new WrappedString(”aardvark”);  String s1 = new String(”aardvark”);  String s2 = new String(”aardvark”);  hs.add(ws1); hs.add(ws2); hs.add(s1); hs.add(s2);  System.out.println(hs.size()); } }  What is the result?()A 0B 1C 2D 3E 4F Compilation fails.G An exception is thrown at runtime.

判断题使用String s1=new String("Java");String s2=new String("Java")创建两个字符串时,s1,s2使用不同的内存空间A对B错