java程序,假设s1,s2,s3和s4是四个字符串引用,分别对它们进行如下赋值:
String s1="Welcome to java";
String s2=s1;
String s3=new String("Welcome to java");
String s4=s3.intern();
分析并写出下列表达式的结果,然后编程验证你的分析。
(1)s1=s2 (13)s1.length()
(2)s2=s3 (14)s1.subString(5)
(3)s1.equals(s2) (15)s1.SubString(5,11)
(4)s2.equals(s3) (16)s1.startsWith("wel")
(5)s1.compareTo(s2) (17)s1.endsWith("java")
(6)s2.compareTo(s3) (18)s1.toLowerCase()
(7)s1==s4 (19)s1.toUpperCase()
(8)s1.charAt(0) (20)" Welcome ".trim()
(9)s1.indexOf('j') (21)s1.replace('o','T')
(10)s1.indexOf('to') (22)s1.replaceAll("o","T")
(11)s1.lastindexOf('j') (23)s1.replaceFirst("o","T")
(12)s1.lastindexOf("o",15) (24)s1.toCharArray()
求帮忙!!!
java程序,假设s1,s2,s3和s4是四个字符串引用,分别对它们进行如下赋值:
答案:3 悬赏:30
解决时间 2021-03-07 19:03
- 提问者网友:wodetian
- 2021-03-06 18:42
最佳答案
- 二级知识专家网友:心与口不同
- 2021-03-06 20:18
(1)Welcome to java
(2)Welcome to java
(3)true(4)true
(5)(6)0
(7)true
(8)W(9)11(10)8(11)11
(12)-1(13)15(14)me to java
(15)me to (16)false(17)true
(18)welcome to java
(19)WELCOME TO JAVA
(20)Welcome(trim去空格的意思)
(21)WelcTme tT java
(22)WelcTme tT java
(23)WelcTme to java
(24)Welcome to java
(2)Welcome to java
(3)true(4)true
(5)(6)0
(7)true
(8)W(9)11(10)8(11)11
(12)-1(13)15(14)me to java
(15)me to (16)false(17)true
(18)welcome to java
(19)WELCOME TO JAVA
(20)Welcome(trim去空格的意思)
(21)WelcTme tT java
(22)WelcTme tT java
(23)WelcTme to java
(24)Welcome to java
全部回答
- 1楼网友:情战辞言
- 2021-03-06 22:37
public class Test {
public static void main(String[] args) {
String s1="Welcome to java";
String s2=s1;
String s3=new String("Welcome to java");
String s4=s3.intern();
System.out.println("s1=s2:" + (s1==s2));
System.out.println("s2=s3:" + (s2==s3));
System.out.println("s1.equals(s2):" + s1.equals(s2));
System.out.println("s2.equals(s3):" + s2.equals(s3));
System.out.println("s1.compareTo(s2):" + s1.compareTo(s2));
System.out.println("s2.compareTo(s3) :" + s2.compareTo(s3));
System.out.println("s1==s4:" + (s1==s4));
System.out.println("s1.charAt(0) :" + s1.charAt(0) );
System.out.println("s1.indexOf('j') :" + s1.indexOf('j') );
System.out.println("s1.indexOf('to'):" + s1.indexOf("to"));
System.out.println("s1.lastindexOf('j') :" + s1.lastIndexOf("j"));
System.out.println("s1.lastindexOf(\"o\",15):" + s1.lastIndexOf("o",15));
System.out.println("s1.length():" + s1.length());
System.out.println("s1.subString(5):" + s1.substring(5));
System.out.println("s1.SubString(5,11):" + s1.substring(5,11));
System.out.println("s1.startsWith(\"wel\"):" + s1.startsWith("wel"));
System.out.println("s1.endsWith(\"java\"):" + s1.endsWith("java"));
System.out.println("s1.toLowerCase():" + s1.toLowerCase());
System.out.println("s1.toUpperCase():" + s1.toUpperCase());
System.out.println("\" Welcome \".trim():" + " Welcome ".trim());
System.out.println("s1.replace('o','T'):" + s1.replace('o','T'));
System.out.println("s1.replaceAll(\"o\",\"T\"):" + s1.replaceAll("o","T"));
System.out.println("s1.replaceFirst(\"o\",\"T\"):" + s1.replaceFirst("o","T"));
System.out.println("s1.toCharArray():" + s1.toCharArray());
}
}
- 2楼网友:虚伪的现实
- 2021-03-06 21:24
public class test {
public static void main(string[] args) {
string s1="welcome to java";
string s2=s1;
string s3=new string("welcome to java");
string s4=s3.intern();
system.out.println("s1=s2:" + (s1==s2));
system.out.println("s2=s3:" + (s2==s3));
system.out.println("s1.equals(s2):" + s1.equals(s2));
system.out.println("s2.equals(s3):" + s2.equals(s3));
system.out.println("s1.compareto(s2):" + s1.compareto(s2));
system.out.println("s2.compareto(s3) :" + s2.compareto(s3));
system.out.println("s1==s4:" + (s1==s4));
system.out.println("s1.charat(0) :" + s1.charat(0) );
system.out.println("s1.indexof('j') :" + s1.indexof('j') );
system.out.println("s1.indexof('to'):" + s1.indexof("to"));
system.out.println("s1.lastindexof('j') :" + s1.lastindexof("j"));
system.out.println("s1.lastindexof(\"o\",15):" + s1.lastindexof("o",15));
system.out.println("s1.length():" + s1.length());
system.out.println("s1.substring(5):" + s1.substring(5));
system.out.println("s1.substring(5,11):" + s1.substring(5,11));
system.out.println("s1.startswith(\"wel\"):" + s1.startswith("wel"));
system.out.println("s1.endswith(\"java\"):" + s1.endswith("java"));
system.out.println("s1.tolowercase():" + s1.tolowercase());
system.out.println("s1.touppercase():" + s1.touppercase());
system.out.println("\" welcome \".trim():" + " welcome ".trim());
system.out.println("s1.replace('o','t'):" + s1.replace('o','t'));
system.out.println("s1.replaceall(\"o\",\"t\"):" + s1.replaceall("o","t"));
system.out.println("s1.replacefirst(\"o\",\"t\"):" + s1.replacefirst("o","t"));
system.out.println("s1.tochararray():" + s1.tochararray());
}
}
我要举报
如以上问答内容为低俗、色情、不良、暴力、侵权、涉及违法等信息,可以点下面链接进行举报!
大家都在看
推荐资讯