Convert java string to python

Jython — Convert Java array with Java Strings to Python list with Python strings

[‘India’, ‘China’, ‘Nepal’, ‘Bhutan’] Convert String to list of characters We can Convert String to List of characters using list function. 1 2 3 4 5 6 7 8 str = «Hello world» # call split function list1 = list ( str ) print ( str ) Convert Strings to List of Lists using map() Output: Explanation-

String to List in Python

So far, we have discussed various conversions in Python. In this tutorial, we will learn another one, which is Converting a string to a list in Python.

We will use the following methods to meet our objective-

Let us discuss each one of them.

In the first program, we will make use of split() to convert the string to a list in Python.

Using split()

The program given below illustrates how it can be done.

# Initialising the string values str_val1 = "Let us study programming." str_val2 = "But before that it is essential to have a basic knowledge of computers." str_val3 = "So first study what is IPO cycle." str_val4 = "Then learn about the generation of computers." #using split() print(str_val1.split()) print(str_val2.split()) print(str_val3.split()) print(str_val4.split())

['Let', 'us', 'study', 'programming.'] ['But', 'before', 'that', 'it', 'is', 'essential', 'to', 'have', 'a', 'basic', 'knowledge', 'of', 'computers.'] ['So', 'first', 'study', 'what', 'is', 'IPO', 'cycle.'] ['Then', 'learn', 'about', 'the', 'generation', 'of', 'computers.']

Explanation-

1. In the first step, we have initialized the four strings that we would like to convert.
2. After this, we have used the split() so that we obtain a list in which each word of a string represents an element of the list.

In the second program, we have specified a separator in split().

Using split() with a Separator

Consider the given program,

# Initializing the string values str_val1="Let @ us @ study @ programming." str_val2="But # before # that # it # is # essential # to # have # a # basic # knowledge # of # computers." str_val3="So $ first $ study $ what $ is $ IPO $ cycle." str_val4="Then % learn % about % the % generation % of % computers." # Using split() print(str_val1.split("@")) print(str_val2.split("#")) print(str_val3.split("$")) print(str_val4.split("%"))

['Let ', ' us ', ' study ', ' programming.'] ['But ', ' before ', ' that ', ' it ', ' is ', ' essential ', ' to ', ' have ', ' a ', ' basic ', ' knowledge ', ' of ', ' computers.'] ['So ', ' first ', ' study ', ' what ', ' is ', ' IPO ', ' cycle.'] ['Then ', ' learn ', ' about ', ' the ', ' generation ', ' of ', ' computers.']

Explanation-

The approach is similar to the previous program, the only difference it takes an element in the list whenever a separator occurs.

In this program, the separators in the strings were @, #, $ & %.

Now, let’s see how to strip() can be used.

Using strip()

The following program illustrates the same-

# Initialising the string values str_val1 = "Let us study programming." str_val2 = "But before that it is essential to have a basic knowledge of computers." # Using list() print(list(str_val1.strip())) print(list(str_val2.strip()))

['L', 'e', 't', ' ', 'u', 's', ' ', 's', 't', 'u', 'd', 'y', ' ', 'p', 'r', 'o', 'g', 'r', 'a', 'm', 'm', 'i', 'n', 'g', '.'] ['B', 'u', 't', ' ', 'b', 'e', 'f', 'o', 'r', 'e', ' ', 't', 'h', 'a', 't', ' ', 'i', 't', ' ', 'i', 's', ' ', 'e', 's', 's', 'e', 'n', 't', 'i', 'a', 'l', ' ', 't', 'o', ' ', 'h', 'a', 'v', 'e', ' ', 'a', ' ', 'b', 'a', 's', 'i', 'c', ' ', 'k', 'n', 'o', 'w', 'l', 'e', 'd', 'g', 'e', ' ', 'o', 'f', ' ', 'c', 'o', 'm', 'p', 'u', 't', 'e', 'r', 's', '.']

Explanation-

1. In the first step, we have initialized the two strings that we would like to convert.
2. After this, we have used the strip() so that we obtain a list, where each character represents of the string represents an element in the list.

Convert Strings to List of Lists using map()

# Initializing the string values str_val1="Let us study programming." str_val2="But before that it is essential to have a basic knowledge of computers." #using split() str_val1 = str_val1.split() str_val2 = str_val2.split() list_str1 = list(map(list,str_val1)) list_str2 = list(map(list,str_val2)) #displaying the list values print(list_str1) print(list_str2)

[['L', 'e', 't'], ['u', 's'], ['s', 't', 'u', 'd', 'y'], ['p', 'r', 'o', 'g', 'r', 'a', 'm', 'm', 'i', 'n', 'g', '.']] [['B', 'u', 't'], ['b', 'e', 'f', 'o', 'r', 'e'], ['t', 'h', 'a', 't'], ['i', 't'], ['i', 's'], ['e', 's', 's', 'e', 'n', 't', 'i', 'a', 'l'], ['t', 'o'], ['h', 'a', 'v', 'e'], ['a'], ['b', 'a', 's', 'i', 'c'], ['k', 'n', 'o', 'w', 'l', 'e', 'd', 'g', 'e'], ['o', 'f'], ['c', 'o', 'm', 'p', 'u', 't', 'e', 'r', 's', '.']]

Explanation-

1. In the first step, we have initialized the two strings that we would like to convert.
2. After this, we have used the split() method followed by map() so that we map the list functionality to each element of the string.
3. On executing the given program, the desired output is displayed.

Finally, in the last program we have used the string of integers,

Converting String of Integers

Consider the program given below,

#initialising the string values str_val1 = "1 2 3 4 5 6 7 8 9" str_val2 = "12 21 32 44 54 76 83" #using split() str_val1 = str_val1.split() str_val2 = str_val2.split() list_str1 = list(map(int,str_val1)) list_str2 = list(map(int,str_val2)) #displaying the list values print(list_str1) print(list_str2)

[1, 2, 3, 4, 5, 6, 7, 8, 9] [12, 21, 32, 44, 54, 76, 83]

Explanation-

The logic is similar to the above program but here we have passed a string of integers and applied the ‘int’ functionality on all the elements.

Conclusion

In this tutorial, we learned the simple techniques of converting a string to a list in python.

Convert a String to a List of Characters in Java, Get the String. · Create a List of Characters. · Convert to String to IntStream using chars() method. · Convert IntStream to Stream using mapToObj

Jython — Convert Java array with Java Strings to Python list with Python strings

I’m using some Oracle API with Jython2.5. Once of the methods returns:

I would like to convert this to a python list, with strings as the elements in the list. e.g.

I’m not sure how to do this, or if there’s a simple method in the java.lang or java.utils library I can use for the conversion.

You may use «tolist» on an array to convert it to a list:

grouplist = GetGroupList().tolist() 

Python String to Array – How to Convert Text to a List, You can create a list by enclosing zero or more items in square brackets, [] , each separated by a comma. A list can contain any of Python’s

Convert string to list python

In this post, we will see how to convert String to list in Python.

We can use String’s split function to convert string to list.

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Converting java.lang.string to PYthon string/dictionary

The equivalent of Java’s operator is the operator, as in: Solution 4: What is the need for using other than ‘==’ as python strings are immutable and memoized by default? The first is to use the module, which contains functions for all of the mathematical operators: The other is to use the method of a string, which is called when you use : Solution 2: You could do: This is similar to Java in that you’re not using an explicit operator.

Converting java.lang.string to PYthon string/dictionary

I am using sutime library for a text related task. Here’s the original code used:

import os import json from sutime import SUTime import ast import json if __name__ == '__main__': test_case = u'I need a desk for tomorrow from 2pm to 3pm' jar_files = os.path.join(os.path.dirname('path to SUTime jar files'), 'jars') sutime = SUTime(jars=jar_files, mark_time_ranges=True) op=sutime.parse(test_case) op1 = op op2 = [] op2 = op1#json.loads(op1)#ast.literal_eval(op1) #print(op2) json_op = json.dumps(list2) print(json_op) 

Note: The original library(sutime.parse) returns json.loads(self._sutime.annotate(input_str)) which was returning this error:

TypeError: the JSON object must be str, bytes or bytearray, not 'java.lang.String' 

So, I modified it such that sutime.parse returns self._sutime.annotate(input_str), which returns the output in java.lang.string format, as follows:

It’s been tricky to use this output for analysis/further processing, as some operations that I’ve been trying to perform on it, like converting to JSON, string assignment result in error saying that it is json.lang.string and hence the operation could not be performed. Is there a way to convert this to a Python string or a Python dictionary. Converting it to a dictionary would be ideal for my use case (or two dictionaries in the case of example provided above). I have tried json.loads to try to convert this java.lang.String to a list of dictionaries but that fails with an error saying:

TypeError: the JSON object must be str, bytes or bytearray, not 'java. 

I’ve tried ast.literal_eval() as well which returns an error saying:

ValueError: malformed node or string: '[,]' 

So, in a final effort, I’ve tried to take off the square braces by assigning:

which results in an error saying:

TypeError: 'java.lang.String' object does not support item assignment 

This behaviour occurs because of changes in the JPype module.

You could amend that part of sutime.py which calls the JVM to supply the additional argument which is included for backwards compatibility:

 jpype.getDefaultJVMPath(), '-Djava.class.path='.format(classpath=self._classpath), convertStrings=True 

Alternately, you can reproduce the earlier behaviour by downgrading the JPype module to an earlier version like version 0.7.5 — for example, by

pip3 uninstall JPype1 pip3 install "JPype1==0.7.5" 

I have the exact problem and I solved it by converting the java.lang.String into python string before converting it into json.

First, amend the last two lines of your sutime.py to this

return json.loads(str(self._sutime.annotate(input_str, reference_date)))[0] return json.loads(str(self._sutime.annotate(input_str)))[0] 

Then in your main class, assign the sutime.parse without dumps() to a variable

time = sutime.parse(test_case) 

and perform the following checking methods:

print(type(time)) print(time['value']) 

The first print will return type’dict’ and the second print will return «2020-06-10».

String Data Structure, Strings in Java; String in Python; Arthimetic Operation in String; Character Counting Based Problems; Subsequence & Substring

From Python to Java: Working with Strings

Java string format in variable like Python

In Python, below code can be run:

I know that Java can format string using

String str = String.format("i = %s", i); 

But, I want to separate «i = %s» and i to make «i = %s» variable and use it on other codes, like below:

String pathFormat = "/v2.0/%s/search"; System.out.println(String.format(pathFormat, userId); 

Yes, you can do that in Java just as in your last example.

String numberFormat = "i = %s"; int i = 17; System.out.println(String.format(numberFormat, i)); 

Java string format in variable like Python, Yes, you can do that in Java just as in your last example. String numberFormat = «i = %s»; int i = 17;

Can you compare strings in python like in Java with .equals?

Can you Compare Strings in Python in any other way apart from == ? Is there anything like .equals in Java?

There are two ways to do this. The first is to use the operator module, which contains functions for all of the mathematical operators:

>>> from operator import eq >>> x = "a" >>> y = "a" >>> eq(x, y) True >>> y = "b" >>> eq(x, y) False >>> 

The other is to use the __eq__ method of a string, which is called when you use == :

>>> x = "a" >>> y = "a" >>> x.__eq__(y) True >>> y = "b" >>> x.__eq__(y) False >>> 

import operator a = "string1" b = "string2" print operator.eq(a, b) 

This is similar to Java in that you’re not using an explicit operator.

However in Java you’re using a method call on the String class (i.e., myString.equals(otherString) ) but in Python eq is just a function which you import from a module called operator (see operator.eq in the documentation).

So == is just like .equals in Java (except it works when the left side is null ).

The equivalent of Java’s == operator is the is operator, as in:

What is the need for using other than ‘==’ as python strings are immutable and memoized by default?

As pointed in other answers you can use ‘is’ for reference(id) comparison.

Print the middle character of a string, Input: str = “Java” Output: v. Explanation: The length of the given string is even. Therefore, there would be two middle characters ‘a’ and

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