Java 程序打印字符串中的字符

编写一个Java程序，通过示例打印字符串中的字符。在下面的示例中，我们使用for循环从头到尾遍历每个字符，并打印给定字符串中的所有字符。在这里，我们使用字符串长度函数来获取字符串长度。

import java.util.Scanner;

public class PrintStringChars1 {
	private static Scanner sc;
	public static void main(String[] args) {
		String str;
		int i;
		
		sc= new Scanner(System.in);

		System.out.print("\n Please Enter any String to Print =  ");
		str = sc.nextLine();
		
		for(i = 0; i < str.length(); i++)
		{
			System.out.println("The Character at Position "  + i + " =  " + str.charAt(i));
		}
	}
}

字符串字符输出

 Please Enter any String to Print =  Hello
The Character at Position 0 =  H
The Character at Position 1 =  e
The Character at Position 2 =  l
The Character at Position 3 =  l
The Character at Position 4 =  o

Java程序打印字符串中的字符示例2

在此示例中，我们使用toCharArray()方法将字符串转换为字符数组。接下来，我们迭代该字符数组并打印字符。

import java.util.Scanner;

public class PrintStringChars2 {
	private static Scanner sc;
	public static void main(String[] args) {
		String str;
		int i;
		
		sc= new Scanner(System.in);

		System.out.print("\n Please Enter any String to Print =  ");
		str = sc.nextLine();
		
		char[] ch = str.toCharArray();
		
		for(i = 0; i < ch.length; i++)
		{
			System.out.println("Character at Position "  + i + " =  " + ch[i]);
		}
	}
}

下面显示的程序将使用While循环显示字符串中的字符。

import java.util.Scanner;

public class PrintStringChars3 {
	private static Scanner sc;
	public static void main(String[] args) {
		String str;
		int i = 0;
		
		sc= new Scanner(System.in);

		System.out.print("\nPlease Enter any String to Print =  ");
		str = sc.nextLine();
		
		while(i < str.length())
		{
			System.out.println("The Character at Position "  + i + " =  " + str.charAt(i));
			i++;
		}
	}
}

 Please Enter any String to Print =  learn Java
Character at Position 0 =  l
Character at Position 1 =  e
Character at Position 2 =  a
Character at Position 3 =  r
Character at Position 4 =  n
Character at Position 5 =   
Character at Position 6 =  J
Character at Position 7 =  a
Character at Position 8 =  v
Character at Position 9 =  a

在此Java打印字符串字符示例中，我们通过创建一个单独的方法来分割代码。

import java.util.Scanner;

public class PrintStringChars4 {
	private static Scanner sc;
	public static void main(String[] args) {
		String str;
		
		sc= new Scanner(System.in);

		System.out.print("\n Please Enter any String to Print = ");
		str = sc.nextLine();
		
		PrintStringCharacters(str);
	}
	public static void PrintStringCharacters(String str) {
		
		for(int i = 0; i < str.length(); i++)
		{
			System.out.println("The Character at Position "  + i + " =  " + str.charAt(i));
		}
	}
}

 Please Enter any String to Print = Programs
The Character at Position 0 =  P
The Character at Position 1 =  r
The Character at Position 2 =  o
The Character at Position 3 =  g
The Character at Position 4 =  r
The Character at Position 5 =  a
The Character at Position 6 =  m
The Character at Position 7 =  s

这是打印字符串字符的另一个示例。在这里，我们不允许代码打印空字符或单词之间的空格。

import java.util.Scanner;

public class PrintStringChars5 {
	private static Scanner sc;
	public static void main(String[] args) {
		String str;
		
		sc= new Scanner(System.in);

		System.out.print("\nPlease Enter any String to Print =  ");
		str = sc.nextLine();
		
		PrintStringCharacters(str);
	}
	public static void PrintStringCharacters(String str) {
		
		for(int i = 0; i < str.length(); i++)
		{
			if(str.charAt(i) != ' ') {
				System.out.println("The Character at Position "  + i + " =  " + str.charAt(i));
			}
		}
	}
}

Please Enter any String to Print =  Gateway
The Character at Position 0 =  G
The Character at Position 1 =  a
The Character at Position 2 =  t
The Character at Position 3 =  e
The Character at Position 4 =  w
The Character at Position 5 =  a
The Character at Position 6 =  y