Write a Java program to perform a case-insensitive check to see if one string contains another. Write a Java program to find and print all starting indices of a substring within a string. Write a Java program to determine the longest common substring between two input strings. Java Code Edit...
s1 = s1.substring(x,y) + ""; 1. JDK 7 中的substring 上述问题在JDK 7中得到了解决。JDK 7中,substring方法会在堆中创建一个新的数组。 源码 AI检测代码解析 //JDK 7 /** * Allocates a new {@code String} that contains characters from a subarray * of the character array argument. The {...
classMain{publicstaticvoidmain(String[] args){ String str1 ="program";// 1st character to the last character System.out.println(str1.substring(0));// program // 4th character to the last characterSystem.out.println(str1.substring(3));// gram} } Run Code Example 2: Java substring() ...
可以使用StringBuilder来构建一个新的字符串,跳过要去掉的子字符串。 Stringstr="Hello, World!";Stringtarget=", ";StringBuildersb=newStringBuilder();for(inti=0;i<str.length();i++){if(!str.substring(i,i+target.length()).equals(target)){sb.append(str.charAt(i));}else{i+=target.length()-...
JDK 7 中的substring 上述问题在JDK 7中得到了解决。JDK 7中,substring方法会在堆中创建一个新的数组。 源码 //JDK 7 /** * Allocates a new {@codeString} that contains characters from a subarray * of the character array argument. The {@codeoffset} argument is the ...
public static void main(String[] args){ } //虽说是固定的,但其实args可以变,args是arguments(参数)的缩写,可以改为任意变量 //中括号的位置也可以变,可以放在参数的后面 //但是习惯上中括号放在前面,后面参数用args 输出语句: System.out.println("Hello,World!");输出之后换行 ...
if (s.contains(c)) { } 使用String.indexOf方法判断是否包含某个子串 int indexOf(String str) Returns the index within this string of the first occurrence of the specified substring. if (str.indexOf(sub) >= 0) { // do something
Example 1: Check if String is Empty or Null class Main { public static void main(String[] args) { // create null, empty, and regular strings String str1 = null; String str2 = ""; String str3 = " "; // check if str1 is null or empty System.out.println("str1 is " + is...
I want to check if my string contains a + character.I tried following code s= "ddjdjdj+kfkfkf"; if(s.contains ("\\+"){ String parts[] = s.split("\\+); s=
String str = "test.txt.backup";int index = str.lastIndexOf("."); //结果为9 常用于处理文件后缀名或路径截取。contains方法 判断字符串是否包含指定子串，返回布尔值。底层调用indexOf实现，可读性更好。示例：String str = "Java is fun";boolean result = str.contains("fun"); // true 适用于简单...