java中为按钮添加图片

• In Java, everything written in double-quotes is considered a string and the text written in double-quotes is display as it is.

  在Java中， 双引号中的所有内容均视为字符串，而双引号中的文本按原样显示。

• Suppose, if we want to add double quotes to a string then we need [\"] escape sequence to escape quotes.

  假设，如果要在字符串中添加双引号，则需要[ \“ ]转义序列来转义引号。

• Let us suppose if we have a string "Preeti" and simply it will display like this preeti and if we want to add double quotes to string (i.e. display like "preeti" ) then we will write a statement like this "\"Preeti\"".

  让我们假设，如果我们有一个字符串“ Preeti”，并且简单地将显示为这样的preeti，并且如果我们想在字符串中添加双引号(例如，显示为“ preeti” )，那么我们将编写一个这样的语句： “ \” Preeti \ ” 。

We will understand this thing with the help of an Example...

我们将借助“示例”来理解这件事。

Example:

例：

public class AddQuotesToString {
public static void main(String[] args) {
// Create a string named str1 with value Java 
// and display like this Java.
String str1 = "Java";
// Create a string named str2 with value OOPS 
// and display like this Java "OOPS".
// For adding double quotes to OOPS  
// then we need or add \" escape sequence to escape quotes 
// around both side string.
String str2 = " \" OOPS \" ";
System.out.println("Display String without quotes " + " " + str1);
System.out.println("Display String with quotes " + " " + str2);
}
}

Output

输出量

D:\Programs>javac AddQuotesToString.java
D:\Programs>java AddQuotesToString
Display String without quotes  Java
Display String with quotes   " OOPS "

翻译自: https://www.includehelp.com/java/how-to-add-double-quotes-to-a-string-in-java.aspx

java中为按钮添加图片