随笔分类 - Java SE 编程练习
demo
摘要：import java.io.*; import java.util.*; public class TestDataOutputStream{ public static void main(String[] args){ try{ ByteArrayOutputStream baos = new
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摘要：import java.io.*; public class TestOutputStreamWriter{ public static void main(String[] args){ try{ OutputStreamWriter osw = new OutputStreamWriter(ne
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摘要：import java.io.*; public class TestInputStreamReader{ public static void main(String[] args){ try{ InputStreamReader isr = new InputStreamReader(Syste
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摘要：import java.io.*; public class TestBufferedReader{ public static void main(String[] args){ try{ BufferedReader br = new BufferedReader(new FileReader(
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摘要：import java.io.*; public class TestFileOutputStream{ public static void main(String[] args){ try{ FileOutputStream out = new FileOutputStream("D:/Java
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摘要：import java.io.*; public class TestFileInputStream{ public static void main(String[] args){ FileInputStream in = null; try{ in = new FileInputStream("
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摘要：import java.io.*; public class FileList{ void tree(File file , int level){ String str = ""; for(int i=0;i<level;i++){ str += " "; } File[] list = file
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摘要：import java.io.*; public class CreateFile{ public static void main(String[] args){ String[] str = new String[6]; str[0] = "D:/A/B/E"; str[1] = "D:/A/B
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摘要：public class StringToArray{ public static void main(String[] args){ String str = "2,6;6,9,3;2,6,3,7"; String[] first = str.split(";"); int[][] array =
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摘要：public class CountJava{ public static void main(String[] args){ String str = "dnajjavaNISLjavaERBjavafvsbdjavaFALjavaEUIcjavazs"; int count = 0; int i
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摘要：public class ClassfiedChar{ public static void main(String[] args){ String str = "ahGJ;j:NLKn;[][]mpon;l()mp'mUIGGUILB"; char[] array = str.toCharArra
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摘要：public class BinarySearch{ int[] a = {6,9,4,14,3,2,1,8,9,12,10,5,7}; void bubbleSort(int[] a){ if(a.length == 0){ System.out.println("错误!数组长度不能为0"); S
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摘要：public class Count3Quit{ //从数组的角度 public void m1(){ boolean[] child = new boolean[500]; for(int i=0;i<child.length;i++){ child[i] = true; } int count
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摘要：import java.util.*; public class OrderDate{ public static void main(String[] args){ Date[] days = new Date[5]; days[0] = new Date(2020,1,1); days[1] =
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摘要：public class OrderNumber{ public static void main(String[] args){ if(args == null){ System.out.println("错误！没有检测到数据输入"); System.exit(-1); } if(args.len
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摘要：public class Fibonacii{ public int m1(int n){ if(n == 1||n == 2){ return 1; } return m1(n-1) + m1(n-2); } public int m2(int n){ if(n == 1||n == 2){ re
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摘要：public class GetPrime{ public void m1(){ boolean flag = true; for(int i=101;i<200;i+=2){ flag = true; for(int j=3;j<i;j++){ if(i%j == 0){ flag = false
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摘要：public class BeDivided { public void m1(){ int count = 0; for(int i=1;i<=100&&count<5;i++){ if(i%3 == 0){ count++; System.out.print(i+" "); } } } publ
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摘要：public class OddSum{ //计算1+2+3+...+99的值 public void odd1(){ int result = 0; for(int i=1;i<=99;i++){ result += i; } System.out.println(result); } //计算1
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摘要：输出 HelloWorld! public class HelloWorld{ public static void main(String[] args){ System.out.println("HelloWorld!"); } }
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