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try{
SimpleDateFormat sf = new SimpleDateFormat();
Date d1 = new Date();
if(d1.before(sf.parse("2009-8-9"))){
System.out.println("before");
}
else{
System.out.println("after");
}
}
catch(Exception e){
e.printStackTrace();
}
<script>
var str1 = "2009-8-9";
var arr1 = str1.split("-");
var date1 = new Date(arr1[0],parseInt(arr1[1])-1,arr1[2]);
var str2 = "2009-8-4";
var arr2 = str2.split("-");
var date2 = new Date(arr2[0],parseInt(arr2[1])-1,arr2[2]);
alert(date1>date2);//true
</script>