Consider the following Java program segment.
import java.io.*;
public class SomeClass{
public void x() {
throw new RuntimeException("Exception from x");
}
public void y(){
throw new IOException("E ......
package com;
import javax.servlet.*;
import javax.servlet.http.*;
import java.io.*;
import java.util.*;
public class pageFilter extends HttpServlet implements Filter {
public pageFilter() {
try {
init();
} catch (Exception ex) {
&nbs ......
public class TestVar{
static int j=1;
public static void main(String[] args){
int i=0;
System.out.println(i);
System.out.println(j);
}
void m() {
int m=5;
System.out.println(m);
}
}
这个程序运行结果为
i=0
j=1
请问为什么没有m=5呢？
因为你没有调� ......
funcntion 方法中实现：
有一个字符串，字符串里包含“数据输入错误”,我如何判断字符串中是否包含这几个字啊。
var s = "asdfsdf数据输入错误sdfdsf";
if(s.indexOf("数据输入错误") >= 0)
alert("包含");
str.contains("数据输入错误");
indexOf
inde ......
JScript code:
<Html>
<Script>
function createOptions(){
var option = new Option(document.form1.select1.value)
document.form1.select2.options[2] = option
}
</script>
<form name=form1>
<select name=select1 size=10>
<option>可选择项目
& ......
Java code:
conn = ds.getConnection();
String SQL = "select * from book where id = ?";
PreparedStatement pstm = conn.prepareStatement(SQL);
pstm.setString(1, id);
System.out.println("id:" + id);
System.out.println(SQL);
ResultSet rs = pstm.executeQuery(SQL) ......
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