import(life): Add java07.

1 files changed, 45 insertions, 0 deletions

diff --git a/works/life/java-practice/javatest/src/javatest/p0701/StringExample.java b/works/life/java-practice/javatest/src/javatest/p0701/StringExample.java
new file mode 100644
index 0000000..be2c7b9
--- /dev/null
+++ b/works/life/java-practice/javatest/src/javatest/p0701/StringExample.java
@@ -0,0 +1,45 @@
+package javatest.p0701;

+

+public class StringExample {

+	public static void main(String args[]) {

+		String s1 = new String("you are a student"), s2 = new String("how are you");

+		if (s1.equals(s2)) // 使用equals方法判断s1与s2是否相同

+		{

+			System.out.println("s1与s2相同");

+		} else {

+			System.out.println("s1与s2不相同");

+		}

+		String s3 = new String("22030219851022024");

+		if (s3.startsWith("220302")) // 判断s3的前缀是否是“220302”。

+		{

+			System.out.println("吉林省的身份证");

+		}

+		String s4 = new String("你"), s5 = new String("我");

+		if (s4.compareTo(s5) > 0)// 按着字典序s4大于s5的表达式。

+		{

+			System.out.println("按字典序s4大于s5");

+		} else {

+			System.out.println("按字典序s4小于s5");

+		}

+		int position = 0;

+		String path = "c:\\java\\jsp\\A.java";

+		position = path.lastIndexOf('\\'); // 获取path中最后出现目录分隔符号的位置

+		System.out.println("c:\\java\\jsp\\A.java中最后出现\\的位置:" + position);

+		String fileName = path.substring(12, 18); // 获取path中“A.java”子字符串。

+		System.out.println("c:\\java\\jsp\\A.java中含有的文件名:" + fileName);

+		String s6 = new String("100"), s7 = new String("123.678");

+		int n1 = Integer.parseInt(s6); // 将s6转化成int型数据。

+		double n2 = Double.parseDouble(s7); // 将s7转化成double型数据。

+		double m = n1 + n2;

+		System.out.println(m);

+		String s8 = String.valueOf(m); // String调用valuOf(int n)方法将m转化为字符串对象

+		position = s8.indexOf(".");

+		String temp = s8.substring(position + 1);

+		System.out.println("数字" + m + "有" + temp.length() + "位小数");

+		String s9 = new String("ABCDEF");

+		char a[] = s8.toCharArray(); // 将s8存放到数组a中。

+		for (int i = a.length - 1; i >= 0; i--) {

+			System.out.print(" " + a[i]);

+		}

+	}

+}