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[英]java program to read a String and a character and display the index of the last occurence of the given character without using any built in method
[英]How to remove character from string without any built in method in Java neither I want to use stringbuilder or string buffer
谁能告诉我如何在不使用任何内置函数和 stringbuffer 或构建器的情况下从字符串中删除字符。 虽然我试图形成一个逻辑但没有得到答案。 在下面的代码中,我想从输入字符串中删除“他”。
import java.util.Scanner;
public class p1 {
public static void main(String[] rgs) {
System.out.println("enter the string");
Scanner s = new Scanner(System. in );
String str = s.nextLine();
p1 g = new p1();
g.replacechar(str);
}
public void replacechar(String str) {
String e = "";
int l = str.length();
char ch[] = str.toCharArray();
for (int i = 0; i < l; i++) {
if (ch[i] == 'h' && ch[i + 1] == 'e') {
ch[i] = ' ';
ch[i + 1] = ' ';
e += ch[i];
} else {
System.out.println("no ");
break;
}
}
System.out.println(e);
}
}
您的问题不是很清楚,但可能是您想要的是(只是修改了您的代码):
for(int i = 0 ; i < ch.length ; i++)
{
if (ch[i] == 'h' && ch[i+1] == 'e')
{
ch[i] = ' ';
ch[i + 1] = ' ';
i = i +2;
}
else
{
e +=ch[i];
}
}
输入:“我的他是”
输出:“我的”
你可以用这个(我一直在用这个:)):
Str.replace('he', '');
不使用任何内置功能。
import java.util.Scanner;
public class replacechar {
String line;
String s = "";
char from ;
char to ;
public replacechar()
{
Scanner scan = new Scanner(System.in);
System.out.println("Enter The String");
line = scan.nextLine();
System.out.println("Enter The Character you want to changer");
from = scan.nextLine().charAt(0);
System.out.println("Enter the Character you want to replace with");
to = scan.nextLine().charAt(0);
replacecharacter(from,to);
}
public void replacecharacter(char f,char t)
{
for(int i =0;i< line.length();i++)
{
if(line.charAt(i) == f)
{
s += t;
}
else
{
s += line.charAt(i);
}
}
System.out.println(s);
}
/**
* @param args the command line arguments
*/
public static void main(String[] args) {
// TODO code application logic here
replacechar obj = new replacechar();
}
}
public static void main(String[] args) {
String input="my he is";
String output="";
String c="he";
String[] split = input.split(c);
for(int i=0;i<(split.length);i++)
{
output=output.concat(split[i]) ;
}
System.out.println(output);
}
split 会正常工作 hr
我们可以将 String 转换为 CharArray 并检查当前字符是否是我们想要删除的字符,如果该字符不是我们想要删除的字符,那么我们将添加到新的字符串中,否则我们不会添加到字符串中
String str = "hello";
String s = "";
char charToRemove = 'h';
char[]ar = str.toCharArray();
for(int i=0;i<ar.length;i++) {
if(ar[i]!=charToRemove)
s+=ar[i];
}
System.out.println(s);
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