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import java.io.*; import java.nio.file.Files; import java.util.*; import java.util.regex.*; public class test { public static void main(String[] args) 阅读全文
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第一种 类似于python的re.search("\d+","123") import java.io.*; import java.util.*; import java.util.regex.*; public class test { public static void readFile() 阅读全文
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import java.io.*; import java.util.*; public class test { public static void readFile() throws IOException { File f = new File("C:\\Users\\15773\\Desk 阅读全文
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import java.io.*; import java.util.*; public class test { public static void main(String[] args) throws IOException{ //lambda表达式:基本语法: (parameters) -> 阅读全文
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import java.io.*; import java.util.*; public class test { public static void main(String[] args) throws IOException{ //将数组转变成list String[] stringlist 阅读全文
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import java.io.*; import java.util.*; public class test { public static void main(String[] args) throws IOException{ // File f = new File("."); //列出某个 阅读全文
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from PyPDF2 import PdfFileWriter, PdfFileReader # 开始页 start_page = 0 # 截止页 end_page = 5 output = PdfFileWriter() pdf_file = PdfFileReader(open("3.pdf" 阅读全文