Java 程序移除字符串的第一个和最后一个字符

编写一个Java程序，使用示例移除或删除字符串的第一个和最后一个字符。在此Java移除第一个和最后一个字符的示例中，我们使用了StringBuilder的deleteCharAt函数。为了获取最后一个索引位置，我们对delFirstLastCharStr使用了字符串长度函数。

Java StringBuilder有一个deleteCharAt函数，可以删除给定索引位置的字符。因此，我们使用这个deleteCharAt函数来移除delFirstLastCharStr字符串的第一个和最后一个字符。

import java.util.Scanner;

public class DeleteFirstLastCharOcc1 {
	private static Scanner sc;
	public static void main(String[] args) {
		String delFirstLastCharStr;
		
		sc= new Scanner(System.in);

		System.out.print("\nEnter String to Delete 1st & last Character =  ");
		delFirstLastCharStr = sc.nextLine();		
		
		StringBuilder sb = new StringBuilder(delFirstLastCharStr);
		sb.deleteCharAt(0);		
		System.out.println("\nThe Final String after Deleting First Char  = " +  sb);
		
		sb.deleteCharAt(sb.length() - 1);		
		System.out.println("\nThe Final String after Deleting First & Last Char  = " +  sb);
	}
}

Java移除字符串首尾字符的输出

Enter String to Delete 1st & last Character =  hello

The Final String after Deleting First Char  = ello

The Final String after Deleting First & Last Char  = ell

Java程序移除字符串首尾字符示例 2

Java StringBuffer也有deleteCharAt函数，可以移除索引位置的字符。因此，我们对delFirstLastCharStr使用了这个函数来移除字符串的第一个和最后一个字符。

import java.util.Scanner;

public class DeleteFirstLastCharOcc2 {
	private static Scanner sc;
	public static void main(String[] args) {
		String delFirstLastCharStr;
		
		sc= new Scanner(System.in);

		System.out.print("\nEnter String to Delete 1st & last Character =  ");
		delFirstLastCharStr = sc.nextLine();		
		
		StringBuffer sbuff = new StringBuffer(delFirstLastCharStr);
		sbuff.deleteCharAt(0);		
		System.out.println("\nThe Final String after Deleting First Char  = " +  sbuff);
		
		sbuff.deleteCharAt(sbuff.length() - 1);		
		System.out.println("\nThe Final String after Deleting First & Last Char  = " +  sbuff);
	}
}

Enter String to Delete 1st & last Character =  java

The Final String after Deleting First Char  = ava

The Final String after Deleting First & Last Char  = av

这是另一个删除字符串首尾字符的Java示例。

import java.util.Scanner;

public class DeleteFirstLastCharOcc3 {
	private static Scanner sc;
	public static void main(String[] args) {
		String delFirstLastCharStr;
		
		sc= new Scanner(System.in);

		System.out.print("\nEnter String to Delete 1st & last Character =  ");
		delFirstLastCharStr = sc.nextLine();		
		
		StringBuilder sb = new StringBuilder(delFirstLastCharStr);
		StringBuffer sbuff = new StringBuffer(delFirstLastCharStr);
		
		sb.deleteCharAt(0);		
		System.out.println("\nString Builder - String after Deleting First Char  = " +  sb);		
		
		sbuff.deleteCharAt(0);		
		System.out.println("String Buffer  - String after Deleting First Char  = " +  sbuff);
		
		sb.deleteCharAt(sb.length() - 1);		
		System.out.println("\nString Builder - String after Deleting First and Last Char  = " +  sb);
		
		sbuff.deleteCharAt(sbuff.length() - 1);		
		System.out.println("String Buffer  - String after Deleting First and Last Char  = " +  sbuff);
	}
}

Enter String to Delete 1st & last Character =  hello world

String Builder - String after Deleting First Char  = ello world
String Buffer  - String after Deleting First Char  = ello world

String Builder - String after Deleting First and Last Char  = ello worl
String Buffer  - String after Deleting First and Last Char  = ello worl

这个Java删除首尾字符的示例使用了substring函数。这里，delFirstLastCharStr.substring(1, delFirstLastCharStr.length() – 1)返回从索引位置1到length-1开始的字符串。

import java.util.Scanner;

public class DeleteFirstLastCharOcc4 {
	private static Scanner sc;
	public static void main(String[] args) {
		String delFirstLastCharStr;
		
		sc= new Scanner(System.in);

		System.out.print("\nEnter String to Delete 1st & last Character =  ");
		delFirstLastCharStr = sc.nextLine();		
		
		String out = delFirstLastCharStr.substring(1, delFirstLastCharStr.length() - 1);
	
		System.out.println("\nThe Final String after Deleting First and Last Char  = " +  out);
	}
}

Java Program to Remove First and Last String character

请参考以下字符串程序。